Outlook for Android not syncing new emails

I am having the same issue aprox since same date.

I am surviving by resetting the account and rebooting the phone. Neither by itself works and I couldn't find any other way. Did the Microsoft suggestion works for you? Are u still having the issue?

Ed./

Yes, I continue to have the issue.  I have reinstalled Outlook 3 or 4 times now. Very frustrating and disruptive to deal with.  And the issue messes up my Team connection each time too. I have only reinstalled that once, as I wondered whether it was the underlying issue. No joy... I have since restored service without reinstalling Teams.  Only Outlook.

I will have to watch whether WiFi connection plays a role with the issue next time around.  I had not taken note of that previously. 

Thanks

Edexg - No the MS support suggestions haven't resolved this issue for me yet. I did reach out via the app to their support staff. One thing we discovered while troubleshooting is I can sync email on other WiFi connections. So it seems it's just my home WiFi that won't allow the sync to occur normally. I'm using a Linksys router and have Xfinity cable for my ISP. I haven't changed anything on my router in the last few months. I've ordered a new router from Amazon to see if that fixes the issue. I asked the MS support rep if there was some kind of utility I can run on my mobile to test connectivity for the ports/services Outlook mobile uses. I haven't heard back from them yet. I know the Outlook desktop client has some diagnostic tools to figure out if anything's getting blocked that needs to get through for normal connectivity. But I'm not aware of something to test via mobile. I did find an option in the Outlook mobile app in the Help & Feedback section to test push notifications. When I try this while connected to my home WiFi, I get "Timed out waiting for a notification. Please make sure you have enabled notifications for Outlook in the Android Settings.". When I disable WiFi and just use cellular data, the push notification works instantly. 

Also note, I eventually do get email - even when I'm connected via my home WiFi. It's just really delayed compared to the notification on the phone of new mail. And sometimes when I try to open the email the body is blank. It also spins when I try to send a new email from my phone while connected via WiFi at home.

I can understand there might have been a change with Android, the Outlook app, our XFinity, or my WiFi router might be flaking out (no other signs of this by the way). But the fact thousands of people have upvoted this same issue on the Outlook mobile app reviews leads me to believe this is an Android 9/Outlook app update issue. It's pretty frustrating that the root cause hasn't been identified yet with so many users affected.

Well some good news and bad news. 

Good News

My email sync issues are resolved when connecting via WiFi at home now!

Bad News

I ended up having to replace my Linksys WRT1900ACS Rev A00 (not that old) router with a Linksys EA7500 V2. My phone started syncing mail immediately after the new router was installed. Now I can send myself a test email and the notification and email receipt are within seconds. I'm not sure what the new router has the old one lacks. Or why things stopped working a few months back when I didn't make any changes to the old router. We weren't having any other connectivity issues we're aware of on the old router. 

Maybe some of you out there could verify if WiFi is the issue with your syncing and if changing to a newer router fixes it. If we could figure out what feature is responsible for root cause, maybe others will know what to look for or the app developers (Google/Android or Microsoft/Outlook Mobile) could account for backwards compatibility.