How To Fix Error 0x721

If you are experiencing error 0x721 on your computer, we hope this guide will help you resolve it.

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    I was recently presented with a unique case involving an inability to manage databases. The pre-competition story was pretty mundane and only surfaced after a fix was launched on the forums and restarted. All the time after the reboot, the client tried to mount the public folder database, the following Active Manager error occurred:

    The specified database could not be mounted. Specified database: NAME of the public folder store; Error code: Active Manager operation failed. Error: Failed to move the database. Error: Operation failed with info: Error 0x721 (Exact security package error occurred) from cli_AmMountDatabaseDirectEx [database: NAME of public folder store serving internet machine r:.child.domain.local].
    + CategoryInfo: InvalidOperation: (Public folder store [Mount-Database], name: adobjectid) InvalidOperationException
    + FullyQualifiedErrorId: F34E87D0,Microsoft.Exchange.Management . SystemConfigurationTasks.MountDatabase

    The following event was also found while checking the main application log:

    (PID 6364, thread 43) Failed to write ba connection taskz data each time index entry 0 is processed. Error: System.InvalidOperationException: The specified database cannot be mounted. Specified database: NAME of the public folder store; Error code: Active Manager operation failed. Error: Collection action failed. Error: Operation failed with message: Error 0x721 (A security-related package error occurred) from cli_AmMountDatabaseDirectEx [database: Public folder store NAME, server: SERVER.child.domain.local]. –> Microsoft.Exchange.Cluster.Replay.AmDbActionWrapperException: Active Operations Advisor failed. Error: Database action failed. Error: Operation failed with message: Error 0x721 (A security package type error occurred) from cli_AmMountDatabaseDirectEx -> Microsoft.Exchange.Data.Storage.AmOperationFailedException: Active manager operation failed. Error: Operation failed with message: Error 0x721 (A monitoring package related error occurred) with cli_AmMountDatabaseDirectEx -> Microsoft.Exchange.Rpc.RpcException: Error 0x721 (Monitoring package related error occurred, airport) cli_AmMountDatabaseDirectEx

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  • in Microsoft.Exchange.Data.Storage.ActiveManager.AmRpcClientHelper.RunRpcOperationWithAuth(AmRpcOperationHint rpcOperationHint, String serverName, String databaseName, NetworkCredential networkCredential, Nullable`1 AmRpcClient& timeoutMs, rpcClient, InternalRpcOperation rpcOperation)

    in Microsoft.Exchange.Cluster.ActiveManagerServer.AmDbAction.MountDatabaseDirect(AmServerName serverName, AmServerName lastMountedServerName, Guid dbGuid, MountFlags banners AmDbActionCode, actionCode)

    error 0x721

    about Microsoft.Exchange.Data.Storage.ActiveManager.AmRpcClientHelper.RunDatabaseRpcWithReferral(AmRpcOperationHint rpcOperationHint, Database Database, TargetServer, String AmRpcClient& rpcClient, InternalRpcOperation rpcOperation)

    The error message and the situation itself are not highly recommended, that’s the difference. An important part of a special event that is not unique to Exchange and is seen with other shell commands is the security suggestion error:

    # for hex 0x721 / decimal 1825
    RPC_S_SEC_PKG_ERROR Winerror.h
    # A unique security package error has occurred.

    error 0x721

    After some research, we found that the active freeware on which Forest Exchange was installed contains a multi-domain structure. In this case, we looked at the entire index and found that there are only two ENABLED computer accounts with associated names in the same forest and located in two different field naming contexts. After identifying the computer account that experts thought was not in use (in this case, the global domain account with fewer Exchange servers installed) and removing it, the manual mount commands successfully resolved the identified issues.

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