AhsayOBM: 220.127.116.11 or above
When creating a MS Exchange Mail Level Backup Set, the following error message is displayed:
LAN Manager authentication level must be 3 or higher.
The error message suggested that for the domain which the Exchange server reside, the Network security: LAN Manager authentication level policy setting must be set to level 3 or higher (Registry security level), which is one of the following:
To resolve the issue, please refer to the following steps:
lan, manager, obm, ahsayobm, exch, exchange, msexchange, auth, authentication