WalterH You may try the SQLite Recovery described here: https://docs.grommunio.com/kb/sqlite.html for this database.
I get a parse error on recover:
localhost:~ # sqlite3 /var/lib/gromox/user/2/1/exmdb/exchange.sqlite3
SQLite version 3.44.2 2023-11-24 11:41:44
Enter ".help" for usage hints.
sqlite> pragma integrity_check;
ok
sqlite>
localhost:~ # cd /var/lib/gromox/user/2/1/exmdb/
localhost:/var/lib/gromox/user/2/1/exmdb # sqlite3 exchange.sqlite3 ".recover" | sqlite3 new.db
Parse error near line 8: object name reserved for internal use: sqlite_sequence
localhost:/var/lib/gromox/user/2/1/exmdb # chmod u=rw,g=rw new.db
localhost:/var/lib/gromox/user/2/1/exmdb # chown grommunio:gromox new.db
localhost:/var/lib/gromox/user/2/1/exmdb # mv exchange.sqlite3 old.db
localhost:/var/lib/gromox/user/2/1/exmdb # mv new.db exchange.sqlite3
localhost:/var/lib/gromox/user/2/1/exmdb # systemctl restart gromox-http
localhost:/var/lib/gromox/user/2/1/exmdb #