1. What are the ports used in Exchange Server monitoring?

1. WMI mode:
   
1. Remote Procedure Call (RPC) (default : 135)
   
2. WMI uses DCOM for remote communication. The server monitored by Applications Manager uses a random port number above 1024 by default to respond. Refer here for more details.
   
2. PowerShell mode:
   
1. PowerShell remoting - TCP 5985 and 5986
   
2. Exchange PowerShell session - TCP 80 and 443
   

Note: In some cases, PowerShell remoting may work without port 5986, but ensure that ports 80 and 443 on the remote server are accessible from the AppManager server to fetch Mailbox and Database statistics.

2. What to do if you can retrieve data when running the script separately, but data collection does not happen in the Applications Manager Exchange Server monitor? 

1. Check whether the prerequisites are done using the hostname or IP address or FQDN. Verify which of these are used to run the script and ensure the same is configured in the Exchange Server monitor. If there is a discrepancy, use the value that worked while running the script manually. Check if the Username is used along with domain name. 
2. Refer to the following KB article for steps to Logon Applications Manager service with Administrator user to use elevated PowerShell during data collection.
   
3. Try running the script directly from command prompt. Open Command Prompt as administrator in the Applications Manager server and run the below command.
   

Command: 

            powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile "&{& '<script-with-full-path>' <arguments>}"

Example: 

            powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile "&{& '<AppManager-Home>\working\conf\application\scripts\powershell\TestConnectivity.ps1' 'host' 'username' 'password'}"

Note: Refer to this KB for the list of scripts which are used to fetch the data in Exchange Server monitor

4. What to do if lot of files are created in C:\ drive (making the drive full) while monitoring Exchange Server via Powershell mode?