Error:
Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Foundation
Event ID: 8311
Task Category: Topology
Level: Error
Keywords:
User: CONTOSO\spadmin
Computer: SPCONTOSO.contoso.com
Description:
An operation failed because the following certificate has validation errors:
Subject Name: CN=CONTOSO-EXCH
Issuer Name: CN=CONTOSO-EXCH
Thumbprint: 8B3B09BBE626945D2FC1275879CA43DC4A820384
Errors:
The root of the certificate chain is not a trusted root authority.
Resolution:SP does not recognize the Exchange server self-signed certificate. Go to Exchange servcer export the Exchange servers’ self signed certificate from the MMC. Go to Central Amdinistration->Security->General Security->Manage Trust-> New, give the name, browse the Exchange self-signed certificate from above, keep all the setting to default and click on. Use the script to test if it works now. Validation script should return True.