Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
SUs are available in a self-extracting auto-elev...
Updated Mar 03, 2023
Version 13.0
Blog Post
Has anyone come across this error since moving to the February SU? If I roll a test mailbox server back to January SU the issue resolves itself.
We have a number of 2016 servers being used as CAS, and have 2013 mailbox servers behind those. Currently we have 2 domains pointing to our Exchange installation for OWA, one of the domains is working fine with no issue, the other displays the following error upon login...
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X-ClientId: VZRGPAJEIHOG9WXGKPG
X-OWA-Error ClientError;exMsg=_y is not defined;file=ReferenceError: _y is not defined
at https://exchange.****.com.au/owa/prem/15.0.1497.47/scripts/boot.1.mouse.js:2:2:3
X-OWA-Version undefined
X-FEServer [2016 CAS]
X-BEServer undefined
Date:23/02/2023 4:48:58 AMThe boot.1.mouse.js file is present on the server.