Are users in a Cloud Environment can be filtered on the attribute OtherFax? Additionally, is that OtherFax attribute in the Cloud copied from the otherFacsimileTelephoneNumber in Active Directory by Entra Connect?
There's no problem to filter cloud environment users by using OtherFax in the Attribute Filters. Also, this attribute can be synced from on-premises AD otherFacsimileTelephoneNumber attribute.