Resolve Outlook Nickname Cache is Not Working & Repair Corrupt NK2 Files

Microsoft Outlook application is widely used for sending and receiving emails with all its data files comprised in personal folder files or alternatively could be used in collaboration with Exchange server so as to have a well set platform for messaging purpose. When typing for addresses in outlook, you must have noted that the to & cc field shows option for the name , making it complete automatically.

Outlook stores the address in files with extension .nk2. The file is by default present in the Outlook folder and is hidden, once the setting to view hidden files is enabled you will find the file the nickname file named as profilename.nk2. The Nickname cache actively works all through and whenever it finds that a new email address is being used, it is added to the nk2 file and would show to auto-complete address in all follow up attempts. The processes specified goes on in a smooth manner, without glitches at all.

The easy to use function at times turn critical & when emails addresses are selected from nick name cache, it wont work or show properly instead something unrecognizable or missing ????. The use of such address either for sending or receiving should not be made as this may result into the spread of problem to much greater extent affecting all those addresses. This then turns to respond in a abrupt manner, error at the time of opening emails & more. The corrupt nk2 file should be repaired at the earliest to avoid facing problems while using Outlook.

Causes of Outlook Nickname Cache Not Working -

• Damaged NK2 Nickname file on senders client system
• Saving address in ANSI String Unicode PR_SMTP_ADDRES_W(0x39fe001f) field
• PST file is corrupted or the outlook profile used is Damaged

Chances of Outlook profile getting damaged, corrupt and inaccessible is more in cases the MS Exchange Profile Update Tool i.e. exprofre.exe is not run or used post cross-site mailbox, for which it is specifically meant.

When exchange server mailbox is moved from one administrative group to another, outlook receives information about the same from mailbox server and work accordingly, however this does not apply to the processes and this results in unusual application performance. To have the changes made use of the exprofre.exe profile update utility is necessary.

How to fix Outlook Mickname cache is not Working Issues?

So, as to have the errors resolved and the corrupt nickname cache file repaired, the steps to be followed are as follows -

1. Hotfix 921582.2 is to be applied and enabled by editing registry which involves the process of validatingsmtpaddress for nk2 file
2. Following this the outlook profile cache has to be reset, as described below -

• Search for the .nk2 files with hidden files included in the search
&nsbp;
• Rename the file from profilename.nk2 to profilename.bak and close the folder
• Restart outlook, thereby you will find that the changes in the file has already been made

Once the process described have been successfully followed you will find outlook work properly that does include the auto-complete features. However, the above method may not apply to & help fix corruption of PST files, whereby other more equipped technique of PST repair & rescue need to be applied for accessing the outlook data files.