Error with discovery mailbox with Exchange Server 2016

[salimhurjuk]

The discovery mailbox, a hidden default mailbox that is required to search mailboxes, cant found. it may have been inadvertently deleted. This mailbox must be re-created before you can search mailboxes.

[#2]

@salimhurjuk If your question is how to re-create the missing discovery mailbox you would start here: https://learn.microsoft.com/en-us/exchange/architecture/mailbox-servers/recreate-arbitration-mailbox...