Exchange Server 2016,

error
Failed to mount database "Mailbox Database XXXXXXXXXXX".
Error: An Active Manager operation failed.
Error: The database action failed.
Error: Operation failed with message: MapiExceptionDatabase
Error: Unable to mount database. (hr=0x80004005, ec=1108) Diagnostic context:
Lid: 65256 Lid: 10722 StoreEc: 0x454 Lid: 1494 ---- Remote Context Beg ----
Lid: 1238 Remote Context Overflow Lid: 34760 StoreEc: 0xFFFFFC02
Lid: 41344 Guid: 7f8e8cbb-8f73-455e-a0d4-009c193fea93
Lid: 35200 dwParam: 0x8B60 Lid: 59596 dwParam: 0x165B25 Msg: JI20
Lid: 43212 dwParam: 0x165B25 Msg: JT05
Lid: 43212 dwParam: 0x165B25 Msg: JT08
Lid: 59596 dwParam: 0x165B25 Msg: WM19
Lid: 59596 dwParam: 0x165B25 Msg: WM20
Lid: 59596 dwParam: 0x165B25 Msg: WM21
Lid: 54472 StoreEc: 0x980 Lid: 42184 StoreEc: 0x454
Lid: 10786 dwParam: 0x0 Msg: 15.01.1591.011:Exchange:7f8e8cbb-8f73-455e-a0d4-009c193fea93
Lid: 51578 Guid: 7f8e8cbb-8f73-455e-a0d4-009c193fea93
Lid: 1750 ---- Remote Context End ----
Lid: 1047 StoreEc: 0x454 [Database: Mailbox Database 1929797550, Server: Exchange.Fermarltd.com]