| Event Id | 252 |
| Source | MSExchangeMTA |
| Description | An internal MTA error has occurred. No supporting stack configured for OSI entity: %1\n |
| Event Information | According to Microsoft: CAUSE: Microsoft Exchange Server configured with the Eicon X.25 stack may be set to an incorrect number of control blocks or virtual circuits. WORKAROUND: 1. Start Registry Editor (Regedt32.exe). 2. Locate the "Eicon X.25 Connections" value under the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeMTA\Parameters 3. Verify that this value (DWORD) has NOT been configured for a value greater than 32 decimal. If it has, change the setting to less than 32 decimal. See the More Information section below. 4. Quit Registry Editor. |
| Reference Links | XCON: Eicon X.25 Limited to Control Block Value of 32 |
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