Solved

How do I add TLS domains in Exchange Online Protection

Posted on 2013-11-14
4
794 Views
Last Modified: 2013-11-14
I need to configure a number of domains for TLS encryption in Exchange Online Protection. I run Exchange 2007 on-premise and use EOP for security. I think the only way to do this is through an EOP transport rule. So I ran the following commands:

$TLSList = Import-CSV -Path "c:\temp\TLSDomains.csv" | Select-Object -ExpandProperty Domains
New-TransportRule -Name "Global TLS Domains List" -RecipientDomainIs $TLSList -RouteMessageOutboundRequireTls $true

I get the following error:
The rule can't be created because it is too large. It has 11502 characters, and the maximum number of characters is 4096. Reduce the size, either by removing content, such as words or regular expressions, from the rule; or by removing conditions, exceptions, or actions from the rule.

The TLSDomains.csv file contains over 250 domains. Is this a limit I can increase or do I have to create multiple rules?

Am I doing this the right way or is there another place to add my TLS domains?

Thank you.
0
Comment
Question by:cyberleo2000
  • 2
  • 2
4 Comments
 
LVL 40

Accepted Solution

by:
Vasil Michev (MVP) earned 500 total points
ID: 39648309
Split it to multiple rules, or use wildcards/regexp to minimize the number of domains.

Some other limits you might run into:

http://technet.microsoft.com/en-us/library/jj907303(v=exchg.150).aspx#TransportRuleLimits
0
 

Author Comment

by:cyberleo2000
ID: 39648345
And this is the only way to force encryption when sending to a domain, via a transport rule?
0
 
LVL 40

Expert Comment

by:Vasil Michev (MVP)
ID: 39648407
0
 

Author Comment

by:cyberleo2000
ID: 39648464
We're just using exchange online protection at this point.

thanks
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Is your Office 365 signature not working the way you want it to? Are signature updates taking up too much of your time? Let's run through the most common problems that an IT administrator can encounter when dealing with Office 365 email signatures.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
A company’s greatest vulnerability is their email. CEO fraud, ransomware and spear phishing attacks are the no1 threat to a company’s security. Cybercrime is responsible for the largest loss of money to companies today with losses projected to r…

777 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