The RoamCache folder contains a list of files which mostly contain lists themselves.
This belongs to the AutoComplete feature which stores the actual cache in the mailbox itself and no longer in a separate nk2-file (since Outlook 2010). These properties are extracted to the RoamCache folder on a disk for performance reasons so it wouldn't have to query the mailbox itself and extract it from there each time.įor instance, addresses to which you've sent an email before. Sometimes the data is compressed or encoded in a very specific way. These properties and settings are stored as hidden messages. This not only applies to backup and restore scenarios (for POP3 accounts) but also when you have an Exchange account and use that on multiple PCs with Outlook and, for some features, even in OWA. The benefit of this is that you maintain much of your Outlook settings even when you move between computers. More and more properties and settings are stored within the mailbox. You can paste the path mentioned above in the Address Bar of Explorer to quickly open the location. C:\Users\%username%\AppData\Local\Microsoft\Outlook\RoamCache.Location of the RoamCache folderīy default, the RoamCache folder is stored in the following location: You do not have to include it in your backups.
In short, the RoamCache folder contains an extracted cache of (list) properties and settings which are stored within the mailbox itself.
If so, can I also restore it on another computer? What exactly is being stored in these files and should I include this folder in my backups? Inside it, there are a lot of “Stream” files like Stream_Autocomplete_*, Stream_Calendar_* and Stream_CategoryList_* 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.