Hi Readers,
We have found that there are many DL’s in our organization that are still on old versions.
How to find DL versions:-
Log on to exchange 2010 management shell:
$collect = Get-DistributionGroup -ResultSize unlimited | select Name,samaccountname,exchangeversion
$collect | export-csv c:\exportDl.csv
Now you have two options to upgrade
1. upgrade all Lists at ones
Get-DistributionGroup -ResultSize unlimited | Set-DistributionGroup -forceupgrade
2. Do some of the lists to see how it goes like I have done only 250 to first check
Set-DistributionGroup “DLName” -forceupgrade
you can use notepad++ & you don’t have to write any script, follow below screen shot.
step1: replace ^(.+)$ with “\1” (Regular expression should be selected at below)
step2:
step3: After replace it will look like below
Now enter these in Shell 🙂
Regards
SUkhija Vikas
Tech Wizard 
Hi Sukhija,
Great article. There is a typo in the very first command:
$collect = Get-DistributionGroup -ResultSize >>unmilited<<
Thanks.
Thx Kevin, I have corrected it.
Hello Vikas.
Very clarifying post.
We had this problem same problem on an Exchange 2013 Migration. Since we have no intention of keeping the old Exchange servers,
What i did was:
Get-DistributionGroup -ResultSize Unlimited | Set-DistributionGroup -ForceUpgrade
If you have multiple domains before running the command above, run:
Set-ADServerSettings -ViewEntireForest $True
Hello,
Great article, other than Distribution Groups, Mail Contacts, Email Address Policies, and Address Lists what other Exchange 2010 items need upgrading?
Thank you,
Matt
Hi Matt,
If you are already on 2010 than the things that you mentioned are correct otherwise there is a whole migration process that needs to be followed.