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to the other, my AutoComplete cache was lost and since I never added people as a Contact, my Contacts folder is heavily outdated.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?

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Since recently, I’ve switched the view of my Contacts folder to the Phone List view and arranged that view to group the contacts by Company name.

This works great for the contacts for which I’ve defined a company name. However, the contacts for which I haven’t defined a company name are separated in two groups which are both called “Company: (none)”.

Why is this happening and how can I get all these contacts listed in a single “none” group?

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I’m inspecting my disk about what I should include in my backup and came across the RoamCache folder in a folder where Outlook stores various other files as well.

Inside it, there are a lot of “Stream” files like Stream_Autocomplete_*, Stream_Calendar_* and Stream_CategoryList_*

What exactly is being stored in these files and should I include this folder in my backups?
If so, can I also restore it on another computer?

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When I receive an email from a certain contact or Contact Group, can I get a different “New Email” sound than the default?

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Outlook can find emails with one or more attachments by specifying the "Has Attachments" option.

But how can I search for a specific type of attached file?
e.g. search for emails having .docx, .pdf, .xlsx or .zip files etc.

Is it also possible to only search for text within an attachment and not within the message body?

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Now that Service Pak 1 for Office 2013 has become available, how do I check if I actually have it installed?

Does this Service Pack also apply to my Office 365 Home Premium installation?

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When starting Outlook, every time I need to go through some installation process before it actually opens. Sometimes this also happens when I open a message or do something else.

Why is Outlook doing this and how can I make it go away?

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After making several changes to the Ribbons and Quick Access Toolbars in Outlook, I wanted to make a backup of my customizations.

There is an export button for this in the “Customize Ribbon” and “Quick Access Toolbar” section of the Options dialog but this only backs up the customizations for the current item window and not all the item windows which are available in Outlook. This makes the exporting process quite cumbersome.

Is there a way to backup all the Outlook Ribbon and Quick Access Toolbar customizations at once?

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When I attach a file, I get list of recent files that also includes movies and songs and other items that I will never email. Most of them are too big to attach anyway.

Is there any way to filter the Recent Items list, limit the amount of files being shown there or get rid of it completely?

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Upon cleaning up my hard disk, I came across a lot of eml-files.

Some of them are messages I saved directly while others are exports from email applications that I used over the years like Outlook Express, Thunderbird and even Lotus Notes.

I noticed that recent versions of Outlook can now also directly open eml-files but I actually want to store them within Outlook so all my entire email archive is kept together.

How can I import all these eml-files into Outlook?

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