Hello,

I am getting two error messages (in attachment) again and again on two newly installed Exchange 2013 SP1 servers with combined Exchange roles. I found a lot but could not find and solution. Please guide how to resolve the issue;

Thanks in advance.

Regards,

Hi,

For the first error, please try the following steps to check this issue.

1. Write down the name that is mentioned as [module] in your Event ID 1023 message.
2. Click Start, click Run and type Regedit [enter] (If you do not have a run option just hit the Windows key + R)
3. In the Registry browse to the key:
HKLM\SYSTEM\CurrentControlSet\Services\ServiceName\Performance

Where ServiceName references to the [module] name you wrote down in step 1.
4. Under the Performance branch check the entry that says Library.

5. Check if the file exits in the folder that is referenced in the registry Library entry. 
6. Search the computer for that filename to see if it exists on other locations.
7. Compare file size and versions of the files that are found. If the DLL from step 5 is older/lower version then the ones in other folders you might want to rename this DLL and copy a newer one to the folder.

If you are unable to find the DLL anywhere else on the computer check the original media (CD/DVD) you installed the product from to see if the DLL exist on there. Copy or extract it to the folder where the Perflib expects it.
Then start a Command prompt and type:

REGSVR32 [path][file.dll] where path and file.dll refer to the complete path and filename of the file you just copied.

And refer to this document

https://technet.microsoft.com/en-us/library/cc727009%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

Best Regards.