We have made a migration from four onPrem Exchange 2013 servers to four new Exchange 2019 servers. After the migration Distribution Group Owners can't edit members from Outlook. If the mailbox is in a database on a specific server, it works. But not for mailboxes on the other three servers. Grateful for any help. Has Googled the issue without success. Have tested several suggestions
exchange-2016-distribution-group-owners.html
cannot-manage-distribution-group-exchange-mailbox
