Update Exchange to the Latest CU info.

powershell -Command "Start-Process cmd -Verb RunAs"

while (1 -le 2) { sleep 1 ; Get-Service | where{$_.DisplayName -Like ‘Microsoft Exchange*’} | Set-Service –StartupType ‘Automatic’ }

Exchange Version
GCM exsetup |%{$_.Fileversioninfo}

Get-ExchangeServer | Format-List Name,Edition,AdminDisplayVersion

correlate the version number with

get the migration guide

https://gallery.technet.microsoft.com/office/Exchange-Server-2010-to-80688a86

it is important to update all the servers in your environment to cater for the new Visual C+ packages 

see

https://support.microsoft.com/en-us/help/4295081/add-a-new-visual-c-prerequisite-to-exchange-for-third-party-files

the Cumulative updates required are as follows.

The following cumulative updates for Exchange Server were released on June, 2018.

Cumulative Update 10 for Exchange Server 2016
Cumulative Update 21 for Exchange Server 2013
Update Rollup 22 for Exchange Server 2010 Service Pack 3







Confirm the .NET version in the registry



HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP

correspond the release key value with the table in the following link.

https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/how-to-determine-which-versions-are-installed











Before updating the CU exchange 2013



recieve connectors will break you



https://practical365.com/exchange-server/exchange-server-2013-upgrade-fails-due-to-receive-connector-conflicts/





Run this in the Exchange CLI to check the connectors before running the CU Update.





     


    


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$connectors = Get-ReceiveConnector;

foreach($connector in $connectors)

{

    if($connector.MaxLocalHopCount -gt 1)

    {

        Set-ReceiveConnector -Identity $connector.Identity -MaxLocalHopCount 5 -WhatIf

    }

}












implementation plan



1. Move databases
2010 put server DAG into maintenance mode   dag mainentance script.

2. Disable Certificate Revocation Check in IE

3. Disable Anti-virus

4. Disable backup services

5. Put server in maintenance mode

6. Restart server

7. Install .NET framework 4.7.2 if required

8. Restart server



9. Extend Ad Schema   SETUP /PrepareSchema   and also SETUP /PrepareAD.

9. Install Exchange 2013 CU21 with elevated permissions

10. Restart server

11. Verify server health (check services, check event logs, test Exchange server health w/ various PowerShell commands)

12. Take server out of maintenance mode   stop dag maintenance mode script.

13. Move databases if required.

14. Test Outlook, OWA, ActiveSync, and send/receive capabilities





use this script to test

https://gallery.technet.microsoft.com/scriptcenter/Generate-Health-Report-for-19f5fe5f





Fixing outdated CU updates

https://practical365.com/exchange-server/fixing-outdate-cumulative-updates-net-framework/





uninstalling .NET 4.6.1  

http://www.expta.com/2016/02/how-to-uninstall-net-framework-461.html

recover exchange servers

https://docs.microsoft.com/en-us/exchange/high-availability/disaster-recovery/recover-exchange-servers?view=exchserver-2019

recover exchange database DAG servers

https://docs.microsoft.com/en-us/exchange/high-availability/disaster-recovery/recover-dag-member-servers?view=exchserver-2019

Extract receive connectors for backup.

Get-ReceiveConnector | Format-List | Out-File “C:ExchconfigConnectors.txt”