Here’s just a quick post on removing the Event ID error 106 from your application logs on Exchange Servers.
You will properly at some point see the following in your event log:
Source: MSExchange Common
Message: Performance counter updating error. Counter name is Per-Tenant KeyToRemoveBudgets Cache Size, category name is MSExchangeRemotePowershell. Optional code: 3. Exception: The exception thrown is: System.InvalidOperationException: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly.\
This is caused because the performance counters cannot be loaded properly.