Syncing problems are also very common while you are using office 365. Actually, it can be a real headache when you are trying to communicate with your work partners. When it happens, you might be unable to send or receive emails. It might happen when you are not connected to the network or there are some network issues. In that case, you must check the network connection properly. Either your session has expired or there are problems with your connection. Usually, when connection problems are fixed, syncing problems are also fixed automatically.
If you have been unable to receive any email sent to you, then there are a lot of options which you can try. Your inbox might be full so you can clean out your inbox. There might be important emails in your junk email folder which you need to clear out. There also might be instances where you are unable to send or receive emails due to a blocked account. In that case, you need to reset your account and activate it to resume normal activity. There might be connected accounts in your system. In such cases, receiving or sending emails becomes a problem. As soon as you remove them, your syncing problems might disappear. To fix Office 365 Setup on your mobile phone, you have to identify the issue first.
In your mobile, you must sync your account with your mobile application. Using the Office.com/setup, you can also sync your syncing problems. if you still have syncing problems in your mobile, you must remove your device from the outlook options. You can even try reconnecting your outlook account in your mobile to fix such problems. Sometimes, when you send too large attachments via your outlook account, the message might not be sent. The maximum size of your file must be 25 MB in order to send or receive the mail on your system. Besides that, if you have changed your password on the outlook link, you have to set the same for your mobile device too to avoid syncing problems.