most of our users are getting repeated msls70.dll error in outlook every week. Refer attached screen shot

Question

most of our users are getting repeated msls70.dll error in outlook every week. after updates issue will get resolve but after 1 week again the issue occurs. can someone share the permanent solution for this

Answer 1

So for anyone who is still having issues, this what worked for us.

If you have deployed M365 Apps via Intune, please update the following setting.

Monthly Enterprise Channel doesn't bring the update we are after.

Then let the user accounts sync.
You can also try manually triggering an update via the user device and then use Excel (which is not affected) to update the Office app manually.

Hope this works for you.

The version that you need is this.

Answer 2

Hi Mahesh Angadi,

Have a Good day!

Thank you for posting to Microsoft Community, we are Happy to assist you.

To assist better you, could you please provide us with additional details?

1. Could you please specify the type of account and subscription you are using (e.g., Microsoft 365 business account, Outlook.com/Hotmail.com/Live.com account, or a third-party account)?
2. May I know what version of Outlook do you have? What version of Outlook do I have? - Microsoft Support.

3. Attaching relevant screenshots for your issue would be immensely helpful.

Please share screenshot with hide personal and sensitive data.

Based on your description and regarding to the error message missing msls70.dll

It seems there are problem on office installation files.

In the meantime,

· Try to uninstall Microsoft office using the tool Microsoft support and Recovery Assistant.

References guide refer to Uninstall Office from a PC.

Note: Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.

Best Regards,

Microsoft Community Moderator

Answer 3

What Version/Build of Outlook are you using (File, Office Account, under About Outlook)? I found a recent bug that says issues loading that DLL should be fixed in 17816.xxxxx. Also, there is a new build 17830.20166 please try File, Office Account, Update Options, Update Now and make sure Outlook is on the latest version.

If you go to the Windows Event Viewer Application Log are there any corresponding events for this issue? I want to see if there are any hangs or crashes showing up. They would be Event 1000/1001 for a crash. If you have any please post the Event 1001.

Answer 4

Its spreading like wildfire at my company too.

Need a fix soon.

Answer 5

You need to update to this version.
Then it sorts itself.
Both Outlook and Word are gonna be impacted.
Will have to use Excel to update manually.