Hi all,   a mystery needs solving any suggestions much appreciated:

We are trying to install Exchange Server 2013 on Windows 2012 server.

The ISO File being used is: SW_DVD9_Exchange_Svr_2013w_SP1_MultiLang_Std_Ent_MLF_X19-35118

All preparation and requisites in place.

During Stage 2 Copying files, we receive an error code 1603 and installation halts.

The error states:

Installing product F:\exchangeserver.msi failed. Fatal error during installation. Error code is 1603. Last error reported by the MSI package is 'Source file not found: F:\Setup\ServerRoles\ClientAccess\Owa\prem\version\resources\themes\base\0\microsoft.o365.controls.timeline.mouse.css.  Verify that the file exists and that you can access it.'.

We have verified that the Path in the error is correct and exists BUT the file is not present within the 0 folder.

We have downloaded the ISO from our Action Pack resources twice and attempted 4 separate installations.

We have tried both Mailbox/Client Access  and Mailbox only installations.

The missing file: microsoft.o365.controls.timeline.mouse.css. Hopefully the only file misisng???

Any ideas anyone, could we source a different ISO or copy of the file or ?????

Many thanks in advance

• Moved by Jason Johnston [MSFT]Microsoft employee Tuesday, February 10, 2015 2:23 PM Setup issue

I'm not sure if the ISO you are downloading is RTM or if there are any SP's or CU's included with it.  But I would recommend downloading the latest CU package from Microsoft.  Each CU package represents a complete install of Exchange 2013 so you can run a complete install from the latest packages.  

https://www.microsoft.com/en-us/download/details.aspx?id=45221

Also, make sure you disable AV while youre performing the install.

• Proposed as answer by Hinte Monday, January 05, 2015 10:14 PM

Just ran into the same problem. Full download of exch. 2013 w/sp1 from VLSC. C'mon microsoft, get it together this is annoying. Trying the trick suggested here I'll let you know if it worked for us as well. Thanks Ryan, I'm glad someone is on the ball on this.