New-GlobalAddressList Error with -RoomList

[Red Flag]

I'm getting error while creating new GAL Policy: All room list "IT Rooms" was not found. Please make sure you typed the identity correctly.

However the group exists - showing the GroupType: Universal.

Name DisplayName GroupType PrimarySmtpAddress
---- ----------- --------- ------------------
IT Rooms202106101xxxx IT Rooms Universal itrooms@xxx.onmicrosoft.com

Any idea, what's wrong on it?

The AAD uses AD Connect to sync objects.

[#2 · Accepted solution]

You need to provide an address list object, not a room list (distribution group).

[#3]

@Vasil Michev 

You're right!

The paramater for -RoomList is not a RoomList but AddressList. Same as for -AddressLists. Even if this will be an empy list.
Docs:
New-AddressBookPolicy [-Name] <String> -AddressLists <AddressListIdParameter[]> -GlobalAddressList <GlobalAddressListIdParameter> -OfflineAddressBook <OfflineAddressBookIdParameter> -RoomList <AddressListIdParameter>

Thank you!