Exchange 2019 OWA Error: Your request can't be completed right now. Please try again later.

Question

We are able to login OWA from External Network but when we are trying to open a mail, it is showing below error

We are able to login OWA from External Network but when we are trying to send a mail, it is showing below error

From Internal Domain Network, Outlook Client & OWA is working fine. From External Network, Outlook Client is working fine but OWA is not working well

We had already followed the below article resolution but didn't fix the issue,

https://learn.microsoft.com/en-us/exchange/troubleshoot/setup/owa-your-request-cannot-be-completed

Answer 1

Hi @Al Amran

Since OWA is working fine internally, I think the cause should be network problems.
Do you have some firewalls in the network blocking external requests to OWA?

Here are some links in the similar situation for your reference:
exchange owa error: error: Your request can't be completed right now. Please try again in a few moments.
OWA: Your request can’t be completed right now. Please try again later. problem

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