a few colleagues in China not able to connect outlook.office 365 from home network or 4G hotspot

Question

a lots users reported at same network ( home or 4G) some times outlook can connected to exchange server since one month ago. some times can't . different time but in the same day the status is even different.
When there is issue , there is no login popup prompt.
open the OWA(outlook.office365.com) via IE , there will be error message about TLS expired or wrong TLS setting . via Edge , it will show me "login.microsoftonline.com" rejected the connection.
but ping to outlook.office365.com is good , and the pc can access to internet.
And when the user bring the computer to office network , all working !
i had did some check with TLS1.0 1.1 1.2 setting ; restart outlook , computer all failed.

we are using MS365 MSO(16.0.13127.21210) 32bit
OS: Win 10 enterprise

could anyone can help ?

Answer 1

Hi @Shen, Jing IT-AS-ID

Could you please provide some screenshots about your issue above?

According to my search, the best way around that is providing users with a corporate vpn.

You could also contact the O365 backend to get more information: Ways to contact support for business products - Admin Help

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