Active sync issue exchange 2010

Posted on 2014-03-23
Last Modified: 2014-04-17
I experienced in our environment substantially large growth in logs in our exchange databases. I took a look at this in Exmon and saw several users with spiked CPU time and also logbytes out. I then ran the activesync powershell script to get rid of users who have not connected in 60 days. This took it down some but not all. I then ran the export-activesynclog as shown here I then found several users who were sending 1,000 or more emails over there phone. I have not ran message tracking yet to verify but this seem kind of odd for users in fact to send this amount on any given day. I am trying to gain a better understanding for whats going on. The site I just placed mentioned hits and items received as being a bad thing. Can anyone explain this in lamens terms and what do you suggest as a long term fix rather than block the user.

Let me pause here and ask this question sort of unrelated. First question I have related to this if users are being locked out of AD/Exchange does running a script to kill active sync devices who have not connected in such in such days really resolve the password prompt issue to any degree.
Question by:techdrive
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Expert Comment

by:Simon Butler (Sembee)
ID: 39949722
Review this article from the Exchange product team. It outlines the most common reasons for the growth.

In my experience it could be a single user with an out of date Apple device that has adjusted a calendar entry. You should ensure that all users keep their iOS right up to date.
This isn't a problem that you can fix once and it goes away unfortunately.

You should also review and keep bookmarked the known issues with ActiveSync KB article:

Run a query to look for old ActiveSync partnerships and remove any that are older than 90 days. You can also look at the version of iOS being used using the same queries, then hassle the users involved to update. This is particularly the case if they have an early version 6 OS.

If you have users being locked out of their accounts, that is probably due to cached credentials somewhere. Removing old devices isn't going to help because they aren't causing the lock out, it will be a current device.


Author Comment

ID: 39953844
I ran a total and here are the numbers for active sync. I just wonder how far back they go. It appears it is with the phone as the growth with mailboxes and client data are ok.

Hits      Ping      Sync      FolderSync      DeviceType
831908      0      727877      103959      SAMSUNGS
362627      0      359227      2671      SAMSUNGS
359374      357987      848      216      Android
273599      99864      170944      2122      iPhone
272848      102494      168104      1772      iPhone
250647      126120      3977      119454      MotoDROID
237919      144070      90777      1911      iPhone
231055      14791      198905      334      iPhone
224618      215133      5315      36      Android
223069      212559      9580      7      MotoDROID
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39954470
Cannot answer the question on how far they go back.
Have you queried the ActiveSync Statistics ? That may well give you more of a clue.

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Author Comment

ID: 39954816
If you are talking about get-activesyncdevicestatistics yes and all the devices are within 30 days now lastsuccessfulsync. If not can you elaborate on what you are pointing to with active sync statistics.
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39956387
Have you looked at the OS version of the devices to ensure that they are up to date?


Author Comment

ID: 39969150
Yes I did I think I found the issue. We have over 100 devices that are not up to date and are IOS 6.01 devices. Another thing I am not sure about is I ran the activesync script and there are over 200 users over the 1,000 hits mark. What are hits in relationship to activeync and how does this work.
LVL 63

Accepted Solution

Simon Butler (Sembee) earned 500 total points
ID: 39969466
If you have a high number of Apple users then they are probably upgrading the devices frequently. You should look at the last sync time and remove any that haven't synchronised in over 90 days, that will probably remove a lot of the older devices.

That could also be why you have so many IOS 6 devices - as I would find it surprising that so many would be out of date considering how much Apple nags.


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