webrstr-usa.dll is a process belonging to the Microsoft Exchange Web Mail Resources program . Microsoft Exchange Web Mail Resources "This process is still being reviewed. If you have some information about it feel free to send us an email at pl[at]uniblue[dot]net"
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Determining whether webrstr-usa.dll is a virus or a legitimate Windows DLL depends on the directory location it executes or runs from. Click to Scan your PC including webrstr-usa.dll to Detect any Security Threat.