How to increase the file attachment size in Exchange Server 2010

Please check the size of below configurations:

1.Organizaion Configuration
Organization Configuration | Hub Transport | Global Settings tab | Transport Settings |

2.Server Configuration
Server Configuration | Hub Transport | select a HT server | Receive Connectors -> select a connector | Properties |

3.Send Connector Configuration
Organization Configuration | Hub Transport | Send Connectors -> select connector | Properties |

4.Recipients Configuration
Recipients Configuration | Mailbox | select mailbox | properties | Mail Flow Settings | Message Size Restrictions|

5.Recipients Group Configuration
Recipients Configuration |Distribution Group | select Group | properties | Mail Flow Settings | Message Size Restrictions

6.Global Setting
Please use adsiedit to connect Configuration container :
Configuration container | Services | Microsoft Exchange |YourOrgName| Global Settings | Message Delivery | Properties,check the below values:
a. delivContentLength
b. SubmissionContentLength
c. msExchRecipLimit

7.Transport Rules
Organization Configuration | Hub Transport | Transport Rules

Mailbox Size Limits Are Not Enforced in a Reasonable Period of Time
http://technet.microsoft.com/en-us/libr … 2(EXCHG.80).aspx

NOTE: Apparently, the attachment size will increase by about 33% when it goes through the exchange Server, so if you want to send an attachment that is about  10 mb, make the size limit of about 15mb to be sure.

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