Removing Attachments

The following message was recieved after tring to send an attachment. There was no profanity involved as it was a sales proposal in pdf format. how can I modify the settings in exchange to fix this. Thanks!!

REMOVED_BY_THE_EXCHANGE_EMAIL_SCANNING_SERVICE_008BC5E7_55E9F026D000000
GUID::= b183f79e-d6ab-43a3-8ab2-ace55004d274
PATH::= !CRYPT!84022DD06E4D9AAB7F3945674C44CFC46481D02D06300D7B91F4FEAFFDE4FE5C2A5E4D3F48DFA2411AFA751CFA6C11D877E4FBF3547F89D1E5B940D4DE69D10076F4B1F0448!8404122B246C0C19A30403A3DEF4B3D8D9C8B62DDA18865A215F6400D7FAD043A81389C73855827C5533769B96E6786F565E047A1D0041043C21EF345B74A672291481F0943!8405CE28CEBBAC77D7D92EF36858CD53984C3AF6C0CB6C9FED88848A8D39F9A3684FC379C107D2A740B8A925E418AAB0338F5257A685B6E8352E312209AD9AB1423341D7E36!8403BABC5BE0F35F5DC334A576F6844FDFE09ABDF249C1B929366BBB27FBA67EF7859E235130D89A8F64F9BDAE627661A566AF81ACC3B3E83FAB79A01D38748B77E4C150A45!840D28BE40276C5A5D4621D0D1BCEE1D4AF8A242AB6B50F4DC95C2ECB98B4086FD5DCDFB5875EB523BF391D9A26748D128F1B6E6097A137BC8045EA78B26C2992FC466B7246!8402FC6A6DD7E6BA21EAD36BE625D197BA458253CC341ED9D87B91F5F573643A2BFD0F65708F4B4722F9A70BCBCEBCB0F490F70329580E326A92682487C60ECF40030667749!840C9960CE3F67027D78E1B058E1BA178A23177A1CEB974F2EFABBAB35C35449A48FA77C8E5F36BB2D35F011099F7FA5C5FB0954C3A53D9080DEB835607AB2BC21145687839!311A52FAF793BAF2ACA840A06EA9C60A5FAAA223CBC168EBB804F177E33
FILENAME::= Yuskas Proposal.pdf
TYPE::=
CHARSET::=
REASON::= PROFANITY
SERVER::= SI-SERVER
END::=
REMOVED_BY_THE_EXCHANGE_EMAIL_SCANNING_SERVICE_008BC5E7_55E9F026D000000

A policy violated content was detected and removed from the original mail entity. You can safely save or delete this replacement attachment.