Incidentally, whilst researching this, I also found a useful FAQ about presence and pictures in Lync (Skype for Business) that may be worth a read.
Do this from a Skype for Business Management Shell: Remove-CsPublicProvider -IdentityIf not already enabled select the Show my picture option and then click on the Edit or Remove Picture button. This is a shortcut that simply opens the client Options window and goes directly to the My Picture section. Moreover, cleared and deleted history also remains recoverable. However, remember deletion wouldn’t remove other sensitive data stored by Skype and other chat messenger app, including web browsers. These steps will help you clear Skype chat history. The article also describes some other changes in behaviour that might lead to a purple arrow being shown where the presence indicator normally is. If you have setup Federation in Lync Server 2013 and have upgraded to Skype for Business Server you will need to remove the previously configured Skype Public Provider. In the Skype for Business client click on the circle headshot icon where the user’s own photo would appear. Steps to Delete Skype Conversation and Call History. I regularly add time into my Calendar for when I’m travelling (and mark it as Out of Office) but if my travel plans change (or I’m running late) I might still be online in Skype for Business and that’s what causes the purple spot to be displayed. the appointment status, not to be confused with an Automatic reply message from Exchange), the purple spot appears next to the Skype for Business presence information when they are online anyway…
Expand the license type (E3, etc), and deselect Skype for Business.
It seems that, since the 14 July 2015 update for the Microsoft (Lync 2013) Skype for Business client, when a calendar shows a user as Out of Office (i.e. In the O365 admin portal, go into Active Users, and select the user in question. There are lot of other factors that needs to be considered before making this change and this step can only be a final stage almost in any environment. Tap Account & Profile and then Close your account. My colleague Brian Cain ( clearly has better googling (ahem, Binging) skills than I, because he found Microsoft knowledge base article 3072756, describing a change that explains the phenomenon. This article outlines the technical steps that is required to move an on premise skype for business account to Teams only mode. Go to Settings by tapping the Gear icon on the top right corner. Unfortunately, I couldn’t find anything on the ‘net. I hadn’t seen this before and I wondered what it meant. I noticed a couple of days ago that my Skype for Business presence information was accompanied by a purple dot/spot. Please be warned that the information here may be out of date. To delete a user from your organization’s Skype for Business Manager.
I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. In the Account & Profile tab, select Close your account under the Manage.