Error Message

DCOM errors logged on EV server hosting the storage service of primary Archive for “Enterprise Vault StorageOnline Class”

Log Name:      System
Source:        Microsoft-Windows-DistributedCOM
Event ID:      10006
Task Category: None
Level:         Error
Keywords:      Classic
User:          KVS\cfowler
Computer:      ev2.kvs.local
Description:
DCOM got error "2147944122" from the computer 192.168.5.6 when attempting to activate the server:
{02F4B8EC-1B62-48F5-8162-6C4657E068C1}

Log Name:      System
Source:        Microsoft-Windows-DistributedCOM
Date:          10/12/2020 9:34:20 AM
Event ID:      10006
Task Category: None|
Level:         Error
Keywords:      Classic
User:          KVS\cfowler
Computer:      ev2.kvs.local
Description:
DCOM got error "2147944122" from the computer 192.168.5.6 when attempting to activate the server:
{6642C136-4CBB-48D5-88F1-70CD703FD82D}

Dtrace of W3WP:

EV:L       {VaultCreateInstanceRequest Attempt [5] to create COM object failed. CLSID [{6642C136-4CBB-48D5-88F1-70CD703FD82D} (EnterpriseVault.StorageOnline.1)] Server Name [192.168.5.6] Elapsed [0.012s] Result [The RPC server is unavailable.  (0x800706ba)]

EV:H      {VaultCreateInstanceRequest::CreateInstance} CLSID [{6642C136-4CBB-48D5-88F1-70CD703FD82D} (EnterpriseVault.StorageOnline.1)] Server Name [evserver1.kvs.local] Used Server Name [192.168.5.6] Num of attempts [5] Total elapsed [108.211s] Result [The RPC server is unavailable.  (0x800706ba)]
 EV:H     {GetStorageObject:#92} Could not contact storage server.  Reason: [The RPC server is unavailable.  (0x800706ba)] Reference: [Get storage object: Computer name [evserver1.kvs.local], Context [VaultID: 1E2817933AC594244BF7B510DB7F87BE61110000evserver1]].
 EV:H     {GetStorageObject} Status: [The RPC server is unavailable.  (0x800706ba)]
 EV:H     {CAutoStorageOnline::CreateStorageOnlineByComputerName} Status: [The RPC server is unavailable.  (0x800706ba)]
:H            {CAutoStorageOnline::CreateStorageOnlineByVaultId} (Exit) Status: [Exception]
 EV:H     {CAutoStorageOnline::GetOnlineAttachmentFileSize2:#1002} _com_error exception: [The RPC server is unavailable.  (0x800706ba)]
 EV:H     {CAutoStorageOnline::GetOnlineAttachmentFileSize2} (Exit) Status: [The RPC server is unavailable.  (0x800706ba)]

Windows firewall enabled on EV servers, but not configured for DCOM TCP & UDP ports.

Configure Enterprise Vault Distributed COM (DCOM) services to function through a Windows Firewall.

1. Add the required port range as follows:
1.1 Click Start, Administrative Tools, Component Services.
1.2. Expand Component Services, Computers.
1.3. Right-click My Computer and select Properties.
1.4. Click the Default Protocols tab.
1.5. Select Connection-oriented TCP/IP, and click Properties.
1.6. Use the Add button to add the required port range, for example, "49153-49453".
1.7. You can choose any ports between 49152 - 65535. Ensure that you have at least 300 ports available.
1.8. Leave all other settings with default values.
1.9. Apply the changes.

2. Create the required firewall rules:
2.1. Click Start, Administrative Tools, Windows Firewall.
2.2. Click Inbound Rules, and check that that "COM+ Network Access (DCOM-In)" is enabled.
2.3. Create an inbound rule for TCP Port 135, if one does not exist.
2.4. Create an inbound rule of type "Port". Select TCP and specify the port range that you used in step 1.
2.5. Create another inbound rule of type "Port". Select UDP and specify the port range that you used in step 1.

3. Reboot the server.

Information on the ports used by Enterprise Vault are also listed in the Administrator's guide under 'About the ports used by Enterprise Vault'.

Users are unable to open archived mail items from an alternate, secondary or shared mailbox hosted on remote Ev server after being delegated permissions to access the required mailbox. Below symptoms can be experienced:

1. Update Service Location may return “Error when checking the NetBios machine name for remote EV server”
2. Vault admin console hangs while accessing the task or Services for remote ev server from console.