Microsoft Outlook is one of the most reliable and popular email application. Even if today anybody thinks to use an email client, then Outlook is the first name that comes in everyone mind. The unique feature that makes MS Outlook reaches the height of popularity is its offline mode. It allows users to work in offline mode and save whole data in OST file format. The main objective of Outlook OST file is to permit users to work even if there is no network connectivity or there are not able to access the server. When the connection is build up again with Exchange Server, OST file gets synchronized automatically with the server. However, there are many situations when the OST files fail to synchronize with Exchange Server and does not update the work done in the offline mode. It can create many problems that can badly affect the performance of MS Outlook. Thus, in this blog, we have covered all possible way to fix Outlook OST file sync issue and what are the possible causes behind this MS Outlook OST sync issue.
“There was a bad internet connection, it is impossible for me to access to Outlook in online mode. Thus, I decided to work in an offline mode and write around 15 emails. All these 15 emails get saved in my Offline folder. But when the connection is established again all those emails were not sent. I tried to check my online folder, but did not find any idea about those emails.”
There can be various possible causes that result in an error synchronizing Outlook folder and all of them are discussed below:
As discussed above there can be many possible reasons behind sync issue in Outlook. Thus, directly jumping to a solution, first make sure that OST file is properly synchronized or not.
Check Offline Folder is Synchronized or not
To verify whether the offline folders are synchronized properly or not, follow the steps given below:
Now, to confirm the synchronization is working properly, check the number of items in the Server folder and in the Offline folder. If both contain a same number of items, means synchronization is working correctly. If not, then verify the Profile settings.
To check the profile settings of MS Outlook, follow the steps given below:
In MS Outlook 2003
In MS Outlook 2007
In MS Outlook 2010
Method to Synchronize OST folder with Exchange Server Manually
After verifying the synchronization settings, follow the steps given below:
Method to Synchronize OST File with Exchange Server Automatically
In order to synchronize all offline folders automatically every time, follow the steps mentioned below:
Method to Create New OST File
If the above solutions do not help in rebuilding the OST, then recreate and synchronize it again with Exchange Server.
Outlook OST file is the topmost requirement of any Outlook user to access the data in the server downtime, network, or corruption issues. However, in some cases, users might face error in synchronizing offline folder with Exchange Server. Thus, after understanding the probable reasons behind this OST sync error in Outlook 2016 and below versions, we have discussed various methods to fix Outlook OST file sync issue with Exchange Server. One can refer them as they are proven to be a fruitful solutions.