8,068 questions with Exchange | Exchange Server | Management tags

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HiddenFromAddressListsEnabled

Hi All, I am using Exchange Server SE hybrid configuration. We create users on-premises and then migrate their mailboxes to Exchange Online. I have a CSV file containing users’ email addresses, and these users are currently hidden from the address…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-13T18:28:36.5166667+00:00
Rising Flight 6,116 Reputation points
accepted 2025-12-15T20:45:49.67+00:00
Rising Flight 6,116 Reputation points
2 answers

Attachment upload size limitation (External only)

We are experiencing an issue with Outlook Web App (OWA) on Microsoft Exchange Server 2019 related to attachment upload size when accessing OWA externally from the internet. When users access OWA internally (from the office network / internal URL), they…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-15T11:44:26.1266667+00:00
Sardor Suvonov 20 Reputation points
answered 2025-12-15T13:44:10.3466667+00:00
Vergil-V 7,560 Reputation points Microsoft External Staff Moderator
1 answer

How to fix w3wp.exe

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-15T03:53:28.2433333+00:00
Ulugbek 0 Reputation points
edited an answer 2025-12-15T08:07:20.4933333+00:00
Hani-Ng 6,020 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Maintenance Mode

Hi All, I am using Exchange Server SE Edition(Hybrid). I have two VMs — EXCH01 and EXCH02 — in a DAG. EXCH01 hosts DB1, and EXCH02 hosts DB2. My email flow is quite heavy with a lot of internal relay. I want to reboot the EXCH01 VM. If I follow the steps…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-12T12:52:34.1533333+00:00
Rising Flight 6,116 Reputation points
accepted 2025-12-14T05:15:20.2033333+00:00
Rising Flight 6,116 Reputation points
2 answers

How to configure Exchange 2016 to use 2 domain controllers?

Hi, How can Exchange be configured so that when I reboot either of any 2 DCs for maintenance that Exchange continues to function normally? Now when I do a reboot of one of the DCs the Exchange seems to disconnect from the network and users get prompted…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2023-05-12T17:15:42.7833333+00:00
Ben Lan 181 Reputation points
commented 2025-12-14T00:19:16.0766667+00:00
Michael Martin 0 Reputation points
0 answers

Getting Unauthorized issue for exchange admin reporting API's

Hi Team We are facing multiple Unauthorized issues while calling below exchange admin reporting APIs - https://reports.office365.com/ecp/reportingwebservice/reporting.svc/MailDetailDlpPolicy …

Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
6,816 questions
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
Microsoft Security | Microsoft Authenticator
asked 2023-12-22T13:07:30.93+00:00
Anonymous
commented 2025-12-12T20:03:03.5033333+00:00
Vipin Sakhare 5 Reputation points
1 answer

Standardizing Exchange Server Virtual Directories authentication settings

I need help and suggestions to standardise the authentication of Exchange Server (2016) and Subscription Edition Virtual Directories. I am concerned about security, as I have noticed some of them are blank and are using insecure Basic…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-09T11:46:55.0866667+00:00
EnterpriseArchitect 6,301 Reputation points
commented 2025-12-12T07:15:35.32+00:00
Steven-N 15,800 Reputation points Microsoft External Staff Moderator
1 answer

Email Server down

Request a phone call from microsft and till the date no one call me back, email server already down 1 week time

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-12T02:23:00.7533333+00:00
Admin Asiahub 0 Reputation points
answered 2025-12-12T06:46:31.6333333+00:00
Jade-T 8,680 Reputation points Microsoft External Staff Moderator
1 answer

Miscosoft account needs to change from Personnel to Business.

We purchase licensing for SE Exchange and it is connected to my work email account <Mod remove PII> That account appears to be listed as personnel not business and I am unable to get the licensing information for SE. Is it possible to have my…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-11T16:14:59.6533333+00:00
Jeff Kluver 0 Reputation points
answered 2025-12-12T01:27:33.35+00:00
Jade-T 8,680 Reputation points Microsoft External Staff Moderator
4 answers

Outlook is using a temporary email and I cannot receive emails

The other day, I tried updating from Classic Outlook to New. In doing so, the connection to the exchange server for business email failed to connect. I reverted to Classic Outlook. On starting, Outlook advised that the "Your mailbox has been…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-08T06:42:22.9866667+00:00
Tim Clark 5 Reputation points
edited an answer 2025-12-12T01:01:37.03+00:00
Tim Clark 5 Reputation points
2 answers One of the answers was accepted by the question author.

How can I migrate all mailboxes

I’ve learnt that Im not able to migrate all mailboxes from Ex sever 2013 directly to Ex Sever 2019, my friend told me that I have to migrate from 2013 to 2016 then 2016 sync to Online Clound then sync again to Ex 2019, so I wanna know is it real ? Or any…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-11T08:49:11.1533333+00:00
Montez Martha 60 Reputation points
accepted 2025-12-11T10:50:09.7566667+00:00
Montez Martha 60 Reputation points
2 answers

Getting 503 errors on Exchange Server when accessing OWA or ECP

We are in an emergency situation as one of our exchange servers is down, and while it appears our secondary is up with the Databases (which we failed to), we cannot access the OWA or ECP sites without getting a 503 error (service unavailable). We have…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-08T01:02:37.6366667+00:00
Kirk Becker 0 Reputation points
commented 2025-12-11T09:19:34.84+00:00
Hani-Ng 6,020 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Troubleshoot Backpressure Triggering

On Exchange Server SE and frequently see backpressure alerts, even though system resources appear healthy. The server temporarily restricts message acceptance, but storage, memory, and CPU are nowhere near the thresholds normally associated with…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-10T09:47:48.73+00:00
Rousse Jackson 40 Reputation points
accepted 2025-12-10T14:17:09.5733333+00:00
Rousse Jackson 40 Reputation points
2 answers

DAG Failover Not Working with 2-Node Exchange Servers 2019 cu15 on server 2025

Hi, I have a Database Availability Group (DAG) configured with two Exchange servers: EMAIL01 and EMAIL02. Everything appears to be set up correctly — both servers are members of the DAG, and the witness server is configured. However, when I shut down one…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-04-14T09:39:13.1233333+00:00
parisa moghadam 5 Reputation points
edited an answer 2025-12-10T13:33:44.47+00:00
Vadim Olaru 5 Reputation points
1 answer

How to get rid of scam calendar invitations

I am getting this fake Microsoft event invite in my calendar and can’g get rid of it.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-08-28T09:40:44.1366667+00:00
Henri Kauthen 10 Reputation points
commented 2025-12-09T20:47:39.9066667+00:00
Stanley Boghosian 0 Reputation points
5 answers One of the answers was accepted by the question author.

535 5.7.139 Authentication unsuccessful

We are receiving the following error using the Office 365 SMTP server to send mails: 535 5.7.139 Authentication unsuccessful, the request did not meet the criteria to be authenticated successfully. Same issue with MFA (+ App password) and without…

Microsoft 365 and Office | Development | Office JavaScript API
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2021-08-13T11:12:53.717+00:00
Maurice Wegner 51 Reputation points
commented 2025-12-09T13:19:13.8766667+00:00
Anderson Ipiales 0 Reputation points
4 answers

HMA with ActiveSync won't work with Exchange Server 2019 CU14 HU April but work with CU14 SU March

Hello, I have deployed two environments with similar configuration : Exchange 2019 CU14 Hybrid with Exchange Online / Intune. HMA is implemented on-premises to allow Outlook mobile clients to access on-premises mailboxes using Modern Authentication : On…

Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
6,816 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
Exchange | Hybrid management
Exchange | Hybrid management
The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
2,382 questions
Exchange | Other
Exchange | Other
A powerful email and collaboration platform developed by Microsoft, designed to support enterprise-level communication and productivity. Miscellaneous topics that do not fit into specific categories.
805 questions
asked 2024-07-03T09:00:08.35+00:00
LD-1235 5 Reputation points
commented 2025-12-08T14:15:26.34+00:00
Guido Briem 0 Reputation points
3 answers

is Microsoft Exchange ESU available, how much does it cost, how do I purchase it

Microsoft has announced an ESU for Exchange 2016 and 2019 for 6 months and stated it would be available August 1. Let me know how do I get pricing and order it none of my distributors have information on this.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-09-09T17:17:07.73+00:00
Gerry Falkner 5 Reputation points
answered 2025-12-08T11:49:19.5933333+00:00
Dalida Breški 0 Reputation points
1 answer

on premise credentials issue

Some of our users while loggin in get this error message, one thing thats common is all of those users have gmail logged in , the issue persists even after logging off from gmail, this problem only occurs on some of the on prem exchange server users.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
asked 2025-12-03T18:32:16.7+00:00
Giri Babu Madhavan 0 Reputation points
commented 2025-12-08T03:13:32.22+00:00
Teddie-D 9,505 Reputation points Microsoft External Staff Moderator
2 answers

how to import email from another server migrate from IMAP into an existing (but different) email

We have an old email address (******@bxxxt.com) and a new domain email set up on microsoft office 365. I would like to migrate the emails from the last month into the new ******@domain.com I have set up the migration batch in admin.exchange and the…

Exchange | Exchange Server | Other
Exchange | Exchange Server | Other
A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.
1,546 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,068 questions
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
asked 2023-01-30T09:02:22.9066667+00:00
riverrunsthroughit 0 Reputation points
answered 2025-12-06T07:32:25.3566667+00:00
Nathan swayer 0 Reputation points