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dynamically share a resource mailbox (calendar) between two organisations
Is it possible to dynamically share a resource mailbox (calendar) between two O365 organisations (domain) like a normal mailbox?
- It's the "Default" permission entry that is used, just make sure that it is set to LimitedDetails (well, anything other than None should do).
If you have org relationship in place already, you only need to adjust the permissions on the calendar folder. No need to "share" the calendar. If for whatever reason you do want to do that, you need to configure the room mailbox as additional account in Outlook in order for the button to be enabled.
VasilMichev I can only add permissions for people in my organisation.
If I add the calendar as an additional account I can only send the calendar by e-mail.
- It's the "Default" permission entry that is used, just make sure that it is set to LimitedDetails (well, anything other than None should do).
- Again, there is no need to "share" the calendar if you have an org relationship in place, the Default ("standard"?) permissions already allow people on the other side of the org relationship to view it.
If you do want to share it for some reason, you need to add it to Outlook as additional account. To do that, you need Full Access permissions granted. Then follow the steps here: https://www.michev.info/Blog/Post/2025/how-to-add-a-shared-mailbox-as-additional-account-in-outlook-2016-build-8431-and-above-on-windows-10-1709-and-above