You cannot transfer certain file types in Lync 2010 if the file transfer filter is disabled in Lync Server 2010

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Article ID: 2796968 - View products that this article applies to.
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Assume that you try to transfer certain file types by using a Microsoft Lync 2010 client that does not have the IM and Presence file transfer filter feature enabled. However, the transfer fails, and you receive the following error message:
Your message or invitation was not delivered, possibly because it contains a hyperlink or other content that your system administrator has blocked


This issue occurs because Microsoft Lync Server 2010 blocks the transfer of the following file types for security reasons. This behavior is by design.

.ade .adp .app .asp .bas .bat .cer .chm .cmd .com .cpl .crt .csh .exe .fxp .grp .hlp .hta .inf .ins .isp .its .js .jse .ksh .lnk .mad .maf .mag .mam .maq .mar
.mas .mat .mau .mav .maw .mda.mdb .mde .mdt .mdw .mdz .msc .msi .msp .mst .ocx .ops .pcd .php .pif .pl .pnp .prf .prg .pst .reg.scf .scr .sct .shb
.shs .tmp .url .vb .vbe .vbs .vsd .vsmacros .vss .vst .vsw .ws .wsc .wsf .wsh


To resolve this issue, use Lync Server 2010 to change which file types are blocked by the file transfer filter.

For more information about how to change which files are blocked by the file transfer filter, go to the following Microsoft websites:
How to change the default file transfer filter

Information about the Get-CsFileTransferFilterConfiguration command

Note The file types that are listed in the "Cause" section are blocked by default in both on-premises Lync Server 2010 and in Lync Online. However, you can only customize the allowed or blocked file types filter list for file transfers by using on-premises Lync Server 2010.

For more information about issues when you send or receive files in Lync 2010, click the following article number to view the article in the Microsoft Knowledge Base:
2514042 You cannot use Office Communicator or Lync 2010 to send or receive files


Article ID: 2796968 - Last Review: January 7, 2013 - Revision: 1.0
Applies to
  • Microsoft Lync Server 2010 Enterprise Edition
  • Microsoft Lync Server 2010 Standard Edition
kbsurveynew KB2796968

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