Why are my room accounts not visible in Outlook 365?

Question

Outlook

Good afternoon!
hybrid configuration. Room accounts have been created, they are visible in on-prem, they are selected, occupied, etc. In 365, only the created room-list is visible, the rooms themselves are not visible. "Unable to get free/busy information."
According to Microsoft's note ( https://docs.microsoft.com/en-us/exchange/troubles... a new list of rooms was created directly in Exchange Online, rooms from On-prem were added to it, it is also visible, but the rooms are still not visible.Please tell me
which side to dig in.
UPD:
According to this note https://support.office.com/en-us/article/search-ma...
made by Set-CASMailbox user -EwsAllowList @{add="*MAPI*"}
but unfortunately that didn't help.

Answer 1

The issue was resolved using the Hybrid Deployment Wizard.

Answer 2

Objects from the ground should be synchronized to the cloud as Mayusers (usually this is handled by Azure AD Connect in hybrid). Those. it was not necessary to create them in the cloud - it was necessary to include these objects in synchronization.