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Hi
A really, really old Exchange 2010 SP3 installation on Windows 2008SP2
It has .NET 4.7 and Windows Installer 5.0 installed.
Windows installer 5.0 is not supported for Exchange 2010 SP3 according to https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019 and even though I can't find something officially about it, .NET higher than 4.5 is not supported.
I can uninstall .NET 4.7 from control panel, but I can't seem to find any information about how to downgrade Windows Installer from 5.0 to 4.5
Anyone?
Regards, Lars.
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Hi @Lars
Thanks for visiting our forum, according to your description above, you want to downgrade Windows Installer from 5.0 to 4.5, this question is more related to windows server. So I would remove the irrelevant tag.
By the way, Exchange 2010 is end of support. It’s better to upgrade this Exchange 2010 server to a later version for better user experience.
Exchange 2010 end of support roadmap
Thanks for your understanding and hope your question will be resolved soon.
Yes, I am upgrading the Exchange 2010 to 2019... and one step doing this is to patch it fully to latest update.
As the server is running Windows Installer 5.0 and this is not supported on Exchange 2010, I want to downgrade to 4.5
Hi there,
Yes you can downgrade it, this forum has the steps for the process https://social.technet.microsoft.com/Forums/ie/en-US/07a3e7cf-fda6-43fd-807d-6aa5a7eef757/is-it-possible-to-downgrade-framework-452-to-45?forum=winserver8gen
If the reply is helpful, please Upvote and Accept it as an answer
Yup uninstall it .. Done.
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Windows Vista / 2008SP2 contain Windows Installer 4.5, not 5.0
https://learn.microsoft.com/en-us/windows/win32/msi/released-versions-of-windows-installer
But it must have been upgraded to ver. 5. At least this is what msiexec reports. Question is how to downgrade?