exchage server backup fails with "Job manager lost message channel unexpectedly" (4042659)

Exchage backups fail with "Job manager lost message channel unexpectedly"

Right clicking on the APM to configure times out

Running the following commands show the LocalMachine execution policy is set to AllSigned or something other than RemoteSigned.

powershell.exe -command ". {Get-ExecutionPolicy -scope CurrentUser}"

powershell.exe -command ". {Get-ExecutionPolicy -list}"

An exchange patch or update changed the policy.

C:\Program Files\Microsoft\Exchange Server\Bin>

powershell.exe -command ". {Set-ExecutionPolicy RemoteSigned}"

C:\Program Files\Microsoft\Exchange Server\Bin>

powershell.exe -command ". {Get-ExecutionPolicy -list}"

Scope ExecutionPolicy

----- ---------------

MachinePolicy Undefined

UserPolicy Undefined

Process Undefined

CurrentUser Undefined

LocalMachine RemoteSigned