NimbostratusUser-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; ms-office; MSOffice 14)
When this value of the Header named User-Agent?
EmployeeI don't really understand your question.
User-Agent is a standard HTTP header used to inform the server of the capabilities of the client.
NimbostratusLet me explain you. This header is getting Blocked due to ASD "Automated Client Access" ms-office. I need to know why this is occruing ? What device is using by Client? Do I need to tune my Policy to allow this ASD?
Please
CirrostratusYou are very unclear, but to answer your question..
When Office software downloads a file, it checks the origin (which is described in the file when downloaded) for any changes. While doing this, it uses the User-Agent header you mentioned.
EmployeeAs noted in another answer, this indicates a request that originates from Microsoft Office. For some sites (such as Sharepoint), this may be an entirely valid request.
You need to decide if this is the case.
You can disable the specific signatures that detect this for the policy
200021137 Automated client access "ms-office"