question

MarkLv-8568 avatar image
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MarkLv-8568 asked ChristyZhang-MSFT commented

Office2019 client connection O365 mailbox problem

Hello everyone,

Microsoft issued a notice saying that starting from November 1, 2021, Office2013 and Office2016 are lower than a certain version, which will cause failure to connect to O365 normally. Since our system cannot upgrade the software, my solution is to upgrade the system to 21H1 and Office to 2019 16.0.10378.20029, I think this version may be fine, but I heard from Microsoft's customer service that it needs to be upgraded to the latest version to ensure normal connection to the 365 mailbox.
Since there is no written explanation, and the content of the notice did not mention the Office2019 version.

Reminder: Update to Microsoft 365 and Outlook for Windows connectivity
Office and Microsoft 365 Apps Outlook for Windows Version
Office 2013 15.0.4970.9999 and older
Office 2016 16.0.4599.9999 and older
Microsoft 365 Apps for enterprise (formerly Office 365 ProPlus) 1705 and older
Microsoft 365 Apps for business (formerly Office 365 Business) 1705 and older

office-outlook-itprooffice-itpro
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1 Answer

TKujala avatar image
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TKujala answered ChristyZhang-MSFT commented

Hi @MarkLv-8568,

Here is the minimum Office version requirements to connect Microsoft 365 services.

Office 2019 client should be works normally with Microsoft 365 services.

https://docs.microsoft.com/en-us/deployoffice/endofsupport/microsoft-365-services-connectivity

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Hi @MarkLv-8568 ,

Welcome to our forum!

Agree with Tkujala. As mentioned in the article provided by Tkujala, all versions of Outlook 2019 should be able to connect to Microsoft 365 services, as shown in the below figure.

According to my understanding, in order to avoid encountering performance or reliability issues when using the old version of Office 2019, it is recommended to use the latest version of Office 2019. Because of this, if you encounter problems during use, technical support personnel will also suggest that you could update Office 2019 to the latest version. So, if possible, please remember to update it on time and keep your version of office up to date.
143383-3.png

And I noticed that your current Office 2019 version is 16.0.10378.20029, looks like it's not the newest version. Please check the newest version from this article: Volume licensed versions of Office 2019.
143378-4.png


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Hi @MarkLv-8568 ,

Just checking in to see if above information was helpful. If it is useful, would you mind marking the helpful post as an answer? Which would benefit others who also has similar issues in forum.

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