| Event Id | 4188 |
| Source | Microsoft PC MTA |
| Description | The postoffice NET/PO on \\computername\sharename and the postoffice NET1/PO1 on \\computername1\sharename1 have the same postoffice serial number [22-28798]. Make sure you do not have two drives pointing to the same postoffice. |
| Event Information | According to Microsoft: Where NET/PO is one Microsoft Exchange Server, NET1/PO1 is another Microsoft Exchange Server, and \\computername\sharename is the MAILDAT$ share for the Microsoft Exchange Server PC Mail database. |
| Reference Links | XFOR: Microsoft Mail Connector and Duplicate Serial Numbers |
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