Is it possible to put blocks on group of users calendar where coworkers cannot schedule meetings for period of time

Hi @Sridhar Thota

Welcome to Microsoft Q&A forum 

Currently there is no direct built-in feature in Microsoft Teams or Outlook to automatically block time across multiple users’ calendars with a single action while completely preventing meeting invites. However, I recommend you have your Global Admin to try: 

1.Create All-Day Events on Individual Calendars

This method involves manually adding an all-day event to each user’s calendar to block time, marked as "Busy" or "Out of Office," so coworkers see the time as unavailable: 

-Log in to Outlook (web or desktop) 

-In Outlook Calendar, select the calendar of the first user. 

-Go to Home > New Appointment (or New Event in the web version). 

-Enter a title (e.g., "Focus Time" or "Unavailable"). 

-Set the Start time and End time to cover the desired period. Check the All-day event box for a full-day block or specify exact hours (e.g., 9 AM–12 PM). 

-In the Show As dropdown, select Busy (to indicate unavailability) or Out of Office (to emphasize absence). 

-Optionally, mark the event as Private to hide details from coworkers (they’ll only see "Busy"). 

-Save the event. It will sync to the user’s Teams calendar automatically. 

-Repeat for Each User 

(For more information, please refer: Add your out of office event to the Outlook calendar of others - Microsoft Support )

2.Use Microsoft Viva Insights for Focus Time 

-Check Licensing: Ensure group members have Viva Insights licenses (e.g., Microsoft 365 E3/E5).  

-In Microsoft 365 Admin Center, go to Settings > Org settings > Viva Insights, confirm it’s enabled. 

-In Teams Admin Center, go to Teams apps > Manage apps, ensure Viva Insights is Allowed. 

-Instruct a group leader to start a Shared Focus Plan in Viva Insights (Teams > Wellbeing > Start a shared focus plan). 

-Set group preferences. 

-Share the plan link via Teams/email; users must opt in to schedule Focus Time as “Busy” on their calendars. 

-Announce the Focus Time schedule (e.g., “No meetings 9–11 AM”) via Teams/email. 

-Instruct users to enable auto-decline in Outlook (Settings > Calendar > Events and invitations > Automatically decline conflicts). 

(Visiting for more information:  

Viva Insights app in Teams and on the web - Microsoft Support 

Focus plan for Viva Insights - Microsoft  )

Note: If you’re unsure who the Global Admin is within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.    

By the way, I’m totally agree and understanding the convenient of being able to block time across multiple users’ calendars directly. It definitely great improvement to the current availabilities of Microsoft 365 apps. In that case, I sincerely recommend you go to Feedback community to vote this similar feedback. Our product team is in charge of the site, and they constantly check customer reviews and feedback, The higher votes, the more attention the related team will pay on. And a lot of the features are developed and improved based on customer feedback. 

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.