Issue
Mailbox Shuttle could not sync or switch mapping with following error:

MigrationMRSPermanentException: Error: MapiExceptionCallFailed: Unable to synchronize manifest. (hr=0x80004005, ec=-327)
Diagnostic context:
Lid: 45095 EMSMDB.EcDoRpcExt2 called [length=304]
Lid: 61479 EMSMDB.EcDoRpcExt2 returned [ec=0x0][length=187][latency=15]
Lid: 52176 ClientVersion: 15.0.1178.4
Lid: 50032 ServerVersion: 8.3.389.2
Lid: 23226 --- ROP Parse Start ---
Lid: 27962 ROP: ropIncrCfg [112]
Lid: 27962 ROP: ropUpldStStrmBegin [117]
Lid: 27962 ROP: ropUpldStStrmEnd [119]
Lid: 27962 ROP: ropUpldStStrmBegin [117]
Lid: 27962 ROP: ropUpldStStrmEnd [119]
Lid: 27962 ROP: ropUpldStStrmBegin [117]
Lid: 27962 ROP: ropUpldStStrmEnd [119]
Lid: 27962 ROP: ropUpldStStrmBegin [117]
Lid: 27962 ROP: ropUpldStStrmEnd [119]
Lid: 27962 ROP: ropFXSrcGetBufferEx [156]
Lid: 17082 ROP Error: 0xFFFFFEB9
Lid: 23137
Lid: 21921 StoreEc: 0xFFFFFEB9
Lid: 27962 ROP: ropExtendedError [250]
Lid: 1494 ---- Remote Context Beg ----
Lid: 26426 ROP: ropFXSrcGetBufferEx [156]
Lid: 12628 StoreEc: 0xFFFFFEB9
Lid: 25058 StoreEc: 0xFFFFFEB9
Lid: 4094 StoreEc: 0xFFFFFEB9
Lid: 3742 StoreEc: 0xFFFFFEB9
Lid: 2526 StoreEc: 0xFFFFFEB9
Lid: 1750 ---- Remote Context End ----
Lid: 26849
Lid: 21817 ROP Failure: 0xFFFFFEB9
Lid: 32758
Lid: 16586 StoreEc: 0xFFFFFEB9
Lid: 22518
Lid: 28874 StoreEc: 0xFFFFFEB9
Lid: 29516
Lid: 31820 StoreEc: 0xFFFFFEB9

Solution
1. Move on-premise mailbox to a different mailbox database
2. Remove move request to Exchange online
3. Recreate the mapping

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