Office 365 users sending Winmail.dat attachment

Follow me Ever wondered about people complaining that they got weird attachment with your email named WinMail.dat, they even try to open it but it didn’t open, actually they didn’t have a program capable to open that file. It was the Job of their email client (Mac Mail, Mozilla Opera) whatever they were using and that’s the sole reason that it removed all the styling which you did in your brand new Microsoft outlook and attached it as a strange file called WinMail.dat and presented the user with a dull  text only email. Here is what Microsoft says about it: By default, email messages that are sent from Exchange Online in Office 365/Outlook 2013/Microsoft Exchange Server use the Transport Neutral Encapsulation Format (TNEF) format. Messaging systems that aren’t based on Microsoft Exchange may be unable to interpret messages that use this rich text format. If the recipient’s messaging system can’t process this format, a file attachment that’s called Winmail.dat is added to the message. So now that we know about the issue lets talk about the solution. Well as we have already explained that the issue is not with your computer but with the outdated email client that Recipient using. What needs to be done is that you send him an email in plain text which his email client can understand.  So we have a couple of options here. If the recipient is someone to whom everyone (in your company) sends email and its an issue with everyone then we can do a change on the exchange server itself or if its only your problem then you can make...

Troubleshooting Outlook AutoComplete issues

Follow me In Part 1 of this series we have already discussed the evolution of NK2 to AutoSuggest and then to Auto Complete streaming files. If you haven’t read it, I would recommend reading that, As the terminology used in this article would make more sense then. Anyways, As I mentioned in Part 1 that An user complained that the autocomplete history of her Outlook 2013 get washed off every now and then. i.e. it last not more than two days, as always my first assumption was that the user is confused 🙂 but when I checkout her PC and had a look at the autocomplete streaming files, I had to agree to the user, check out the image below. Image of multiple streaming files The numerous autocomplete files makes it evident that AutoComplete files is getting changed/replaced repeatedly hence the user is loosing her outlook autocomplete information. So to troubleshoot this issue we followed multiple steps and while researching around we did found a lot of useful information about how to troubleshoot AutoComplete issues.  If you do not have much Idea about what is a  Outlook AutoComplete file or NK2 file then you should definitely read the Part 1 of this article series to clear those concepts before reading this. This article is a collection of steps which can be performed to troubleshoot Autocomplete issues. Troubleshooting Steps SafeMode for Outlook Many would feel that this step is irrelevant here but This should be the first step for any outlook issue troubleshooting, Many issues with outlook happen because of some third-party plugin.  So it is always advisable to see...

Nk2 versus Suggested Contacts and AutoComplete

Recently I ran into an issue where the user complained that the autocomplete history of her Outlook 2013 get washed off every now and then. i.e. it last not more than two days, as always my first assumption was that the user is confused 🙂 but when I checkout her PC and had a look at the autocomplete streaming files, I had to agree to the user, check out the image below. Image of multiple streaming files Obviously after seeing this I had to agree with what user was saying and I decided to dig further.  Though I knew about Nk2 to streaming files and in the middle vaguely also remember Suggested Contacts but the picture wasn’t very clear.  Upon digging around I found lots of scattered but very useful information, so I decided to put it on a single page, Hence the article 🙂 . OK, Lets begin with some basic questions like What is AutoComplete History ? Remember, in Outlook (any version) when you are type email address of someone under To/CC/BCC, a list of suggestions start appearing. This list is called as Autocomplete history and is build with the email address with which you communicate via outlook. So if you are sending an email to someone for the first time its email address will not come up as suggestion but from the next time it should. This autocomplete information is stored in a file, in fact its different kind of files with different version of Outlooks NK2 Cache: NK2 file was used with Outlook 2007 and prior versions of outlook. So every outlook profile on a...