| Event Id | 1048 |
| Source | MSExchangeSRS |
| Description | The RefMasterDSA attribute is missing from the Superior Reference object <object name>. |
| Event Information | The directory superior reference object is corrupted. This is normally found under the directory service object in raw mode. The directory database is corrupted.Stop and restart the Site Replication Service. If the error persists, restore the directory database from backup. |
| Reference Links | Microsoft product: Exchange Version: 6.0 Event Source: MSExchangeSRS Event ID: 1048 |
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