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We just recently migrated from Exchange 2010 to 2016. In addition to our user mailboxes we also migrated a couple dozen conference room mailboxes or resource mailboxes as they are referred to in Exchange 2016. All our conference rooms are set to auto booking for everyone except on a particular conference room that is reserved for the executives. Only the executives and their administrative assistants are allowed to book meetings to this conference room. To limit the other employees for booking the executive conference room I used the Message Delivery Restrictions, Accept Messages From, Only Senders in the Following List option in Exchange 2010. I have eight people in the list. Since our move to Exchange 2016 we have had one executive leave the company, one executive admin leave the company, and one admin change responsibilities to cover for the one admin that left. I needed to make the changes to the Only Senders in the Following List option for the executive conference ro

Exchange 2016 Database Availability Group Error adding mailbox databases copies to new DAG server I have 2 existing Exchange 2016 servers that are part of a DAG with 5 databases. After adding a new Exchange 2016 server to the existing DAG then trying to “Add database copy” I received the below error. The seeding operation failed. Error: An error occurred while running prerequisite checks. Error: The specified database isn't configured for replication and therefore cannot be used to perform seed operations. [Database: 12345, Server: NewEamilServer.something.COM] The database list shows the new Exchange server listed under the “SERVER WITH COPIES” column. However, looking at the details on the right-hand pane tells a different story. Passive Unknown Copy queue length: 0 Content index state: Unknown Clicking on the “View details” link shows us other errors. Error Message: “The database file wasn't found after log replay. The cop