Outlook 2016 MSI - Possible to make work with O365 modern Auth & Win7?

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Win7Me2

Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
I have Windows 7 and Office 2016 MSI installer on one of my computers. Computer OS can't be updated for various business reasons.
I'm trying to get Outlook to connect to Office 365 email (broke when they disabled basic authentication).

On another computer I have Windows 7 and Office 2016 Click to run. Outlook and Modern authentication is working on this machine.

I took the same MSI installer from the first machine and installed it on a Windows 10 machine, and I do get the modern authentication login, and this computer connects to Office 365 email as expected. So I know it is possible even for the MSI version to work.

Installed the same MSI installer on a clean Windows 7 VM and have the same issue as the real machine I'm trying to get to work.


Is there a way to get the MSI version to work on Windows 7?
I only have one license for the C2R and need to keep it working on the other machine.

Thank you
 
Hi,

Outlook version 2016 MSO 16.0.4266.1001

I use KB4493226-fullfile to upgrade.
This is the same KB I had to install on the Win10 box using this same MSI installer to get Outlook to download the profile, although I did get the Modern Auth login even before installing KB on the Win10 box.

I also previously tried KB5002051 but removed it to try KB4493226

Is there a different KB update I should install?

On the Win7 box I am still getting the basic auth login box even after setting the registry key
HKCU/software/microsoft/exchange
AlwaysUserMSOAuthForAutoDiscover = 1

I previously had TLS 1.2 and and SSL 3.0 Enabled.
After running the Easy fix it changed it to TLS 1.0, 1.1, 1.2 (SSL 2.0 & 3.0 disabled)

But still not getting Modern Auth login box

Thank you
 
I just created a new temp user profile and Outlook gives proper Modern Auth under the new profile.
It is something in my profile that is still causing the basic auth to have priority over modern.

I check in credential manager and deleted all outlook/exchange entries
After making a restore point and backing up HKCU/Software/Microsoft (and /office/16) I tried replacing as much as windows would let me with the profile still active
Outlook version 2016 MSO 16.0.4266.1001

I use KB4493226-fullfile to upgrade.
This is the same KB I had to install on the Win10 box using this same MSI installer to get Outlook to download the profile, although I did get the Modern Auth login even before installing KB on the Win10 box.

I also previously tried KB5002051 but removed it to try KB4493226

Is there a different KB update I should install?

On the Win7 box I am still getting the basic auth login box even after setting the registry key
HKCU/software/microsoft/exchange
AlwaysUserMSOAuthForAutoDiscover = 1

I previously had TLS 1.2 and and SSL 3.0 Enabled.
After running the Easy fix it changed it to TLS 1.0, 1.1, 1.2 (SSL 2.0 & 3.0 disabled)

But still not getting Modern Auth login box
 
I just created a new temp user profile and Outlook gives proper Modern Auth under the new profile.
It is something in my profile that is still causing the basic auth to have priority over modern.

I check in credential manager and deleted all outlook/exchange entries
After making a restore point and backing up HKCU/Software/Microsoft (and /office/16) I tried replacing as much as windows would let me with the profile still active
Outlook version 2016 MSO 16.0.4266.1001

I use KB4493226-fullfile to upgrade.
This is the same KB I had to install on the Win10 box using this same MSI installer to get Outlook to download the profile, although I did get the Modern Auth login even before installing KB on the Win10 box.

I also previously tried KB5002051 but removed it to try KB4493226

Is there a different KB update I should install?

On the Win7 box I am still getting the basic auth login box even after setting the registry key
HKCU/software/microsoft/exchange
AlwaysUserMSOAuthForAutoDiscover = 1

I previously had TLS 1.2 and and SSL 3.0 Enabled.
After running the Easy fix it changed it to TLS 1.0, 1.1, 1.2 (SSL 2.0 & 3.0 disabled)

But still not getting Modern Auth login box

That whole post got mangled and it wont let me edit it.
Let me try again:

I just created a new temp user profile and Outlook gives proper Modern Auth under the new profile.
It is something in my profile that is still causing the basic auth to have priority over modern.

I check in credential manager and deleted all outlook/exchange entries
After making a restore point and backing up HKCU/Software/Microsoft (and /office/16) I tried replacing as much as windows would let me with the profile still active of HKCU/Software/Microsoft with the one from the clean profile. But still not getting modern auth. So I restored to previous registry.
 
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