New answers tagged custom
Check this link. They had explained how to hide the default Multiple authentication provider page. http://msdn.microsoft.com/en-us/library/office/hh237665(v=office.14).aspx
If you want your own Error message, you have to make an application page (e.g. "error.aspx") and design it as per your requirement. Then set some properties like: properties.Status = SPEventReceiverStatus.CancelWithRedirectUrl; properties.RedirectUrl = "Error.aspx page's url"; Then this page will be displayed instead of the server error page.
This does not answer your specific question about the workflow.xml, but there is an Action in SPD workflows (the kind that run in O365) that allow you to set the status as you wish: http://www.schaeflein.net/Pages/Setting-Workflow-Status.aspx
You can use the following PowerShell script to register your custom CSS file. It will run regardless of the master page used: $web = Get-SPWeb http://myserver/mysite $web.AlternateCssUrl = "/Style Library/MyStyles.css" $web.Update() Just tested it on my SharePoint 2010 Server virtual test machine and it works like a champ, even with the Excel Web Access ...
Any manual changes to out of the box files in 12/14/15 folders are NOT recommended and will be reverted, in case of upgrades and patches. If you really want to change the default classes SharePoint adds to the pages, use jQuery to get over it :) I'm not a design guru but sometimes!important attribute can be of great help. Go figure :)
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