SharePoint Experts, Information Architects, Expert Witness

We provide consulting in a broad array of business and technology from architecture to design to deployment of global systems with a focus on surfacing data in the enterprise. Specialists in Microsoft, we are a premier provider of SharePoint Expertise (including 2016 and Office 365). We also provide Expert Witness/Legal Expert in eDiscovery, source discovery, patent infringement, piracy and more! We also have established SICG DLDS s.a. - our counterpart in Costa Rica that specializes in water systems ( - Contact me direct: or call 704-873-8846 x704.

Search This Blog

Wednesday, February 18, 2015

SharePoint ULS Error UserAgent not available, file operations may not be optimized

ULS Error (repeating) in SharePoint 2013 shows:

UserAgent not available, file operations may not be optimized

A quick shout out to Richard Leeman for the fix - it means that the Blob Cache has to be cleared. Using PowerShell:

$webApp = Get-SPWebApplication "http://<Site>:<Port if needed>" 


Anonymous said...

This only works after doing an IISreset!

Daniel van der Gryp said...

Thanks David

Project_eRally said...

I had this same issue when clicking About Me to access my site.

I ran the flush on our http:// and ran iisreset on all our Web servers and this resolved the issue.

Many thanks, Ellya