Let guests to see room availability and to book a room

IMK 421 Reputation points


We have added meeting rooms as room resource in M365 Admin Portal.

What are my options to let external guest persons to see a room availability (free/busy) and to let these external guests to book a room?

These people belong in another M365 tenant and because this is a temporary situation, we would like to keep this as simple as possible.

Microsoft Exchange Online
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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Accepted answer
  1. Vasil Michev 97,076 Reputation points MVP

    Exchange Online does not support Guest users. To share availability with external users, you need to configure either a sharing policy (for individual sharing) or org relationship (broader, tenant-wide sharing). Details are here: https://learn.microsoft.com/en-us/exchange/sharing/sharing

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