Solved

"Exchange ActiveSync device requests for your users are being blocked." in Event Viewer Logs

Posted on 2016-09-20
3
29 Views
Last Modified: 2016-10-10
I am seeing this event viewer item several times each day on my Exchange 2010 SP3 CAS servers.  The CAS servers (3) are sitting behind an F5 Big IP load balancer.  The SSL cert is on the F5 VIP.   There is no firewall active on any of the CAS servers.

Activesync is working fine.  Smartphones are syncing fine.     I'm just curious if there is a way to stop this error in the event viewer.

Log Name:      Application
Source:        MSExchange ActiveSync
Date:          9/20/2016 7:38:43 AM
Event ID:      1100
Task Category: Requests
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      DWTEXCAS01.DWT.com
Description:
Exchange ActiveSync device requests for your users are being blocked. This problem frequently occurs when the HTTP OPTIONS method request isn't allowed by the firewall. Please check the firewall that filters requests in front of your Client Access server and the Microsoft-Server-ActiveSync virtual directory.
0
Comment
Question by:Dave Zuver
  • 2
3 Comments
 
LVL 29

Accepted Solution

by:
Randy Downs earned 250 total points (awarded by participants)
Comment Utility
looks like the error will remain

active sync test still fails with the same error so I can only assume that the test isn't in some way compatible with exchange 2010 which has been slightly unhelpful.
0
 
LVL 36

Assisted Solution

by:ArneLovius
ArneLovius earned 250 total points (awarded by participants)
Comment Utility
Are you doing any HTTP inspection on the F5 or elsewhere on the path to the CAS servers from the Internet?

Do you have any session timeouts set on the F5 or elsewhere on the path to the CAS servers from the Internet?
0
 
LVL 29

Expert Comment

by:Randy Downs
Comment Utility
awarded points
0

Featured Post

How to improve team productivity

Quip adds documents, spreadsheets, and tasklists to your Slack experience
- Elevate ideas to Quip docs
- Share Quip docs in Slack
- Get notified of changes to your docs
- Available on iOS/Android/Desktop/Web
- Online/Offline

Join & Write a Comment

Learn to move / copy / export exchange contacts to iPhone without using any software. Also see the issues in configuration of exchange with iPhone to migrate contacts.
Possible fixes for Windows 7 and Windows Server 2008 updating problem. Solutions mentioned are from Microsoft themselves. I started a case with them from our Microsoft Silver Partner option to open a case and get direct support from Microsoft. If s…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now