I’m not sure what happened, but suddenly all my emails that were still on the mail server got downloaded again. I now have a huge list of duplicate messages.

How can I quickly clean up this mess?

► Continue to the answer

Whenever I mark a message for follow up with a flag, I see that message 2 or even 3 times in the To-Do List. If I clear the flag the other items remain and only go away after a longer period of time or when I restart Outlook.

Why is this and how can I get rid of these duplicates?

► Continue to the answer

Looking at my Calendar, I see that several (not all) of my appointments and meetings are suddenly showing up multiple times (some even more than 5 times!).

How did this happen and how can I troubleshoot and fix this?

► Continue to the answer

When I add a task to my Tasks folder, it is added twise. When I delete one, it deletes the other as well.

How can I get rid of these duplicates?

► Continue to the answer

Sadly, due to an oversight when migrating my Outlook data from one computer to the other, my AutoComplete cache was lost and since I never added people as a Contact, my Contacts folder is heavily outdated.

I'm now going through my Inbox and Sent Items folder and right click on a sender or recipient and choose: Add to Outlook Contacts

This is of course a really slow process and I think I've learned my lesson by now.

It there a quicker way to review the senders and recipients and add them to my Contacts folder without creating a massive amount of duplicate contacts?

► Continue to the answer

I have an Outlook.com account and on the Outlook.com website, I’ve used the “Clean up contacts” feature in the People section to get rid of my duplicate contacts.

This worked great as I now no longer have any duplicates in Outlook.com. However, in Outlook itself, I still see my duplicates.

I’ve already pressed the Send/Receive button and restarted Outlook for good measure to make sure everything synced up but the duplicates are still there.

Why are my duplicate contacts still there in Outlook and more importantly;
How do I get rid of these duplicates in Outlook itself?

► Continue to the answer

I've backed up my pst-file of my POP3 account from my old computer and now want to use it on my new computer.

I've been told not to use the Import feature to restore my pst-file but to reuse it when setting up my account in Outlook. That way I should be able to keep my rules, view settings and various other personalization settings.

That sounds great and I would prefer not to lose too many of my settings but how exactly do I need to restore my POP3 pst-file to keep all these things?

► Continue to the answer

I’ve configured Outlook.com to collect emails from another account of mine via POP3.

While this works without issues, it really takes a long time before new emails of this POP3 account actually become available in Outlook.com.

Is there a way to configure how often Outlook.com checks for new emails for configured POP3 accounts, force a manual send/receive or anything else to increase the speed to receive new emails?

► Continue to the answer

I have lots of contacts in Outlook and I am looking for a way to update some contact fields so they will be more consistent. For instance, I’m looking to update the following properties;

• For some contacts I’ve entered “AVE” and for other “Avenue”. I want this to be “Avenue” for everyone.
• For some contacts I’ve included the country code in their phone number and I’d like to remove that.
• Change the email address domain of several contacts as their company changed its name and has a new domain name.

How can I achieve these changes without modifying all contacts one-by-one?

► Continue to the answer

When sending a message with my Gmail account in Outlook, I noticed that I the item is being stored twice in my Sent Items folder.

Why is this happening and how can I prevent this?

► Continue to the answer