Use relative URLs in SiteMap in CRM when possible
When possible you will want to use relative URLs instead of absolute URLs in your SiteMap. For example, if you want to link to a custom view from within your SiteMap you would select the View as normal, click on More Actions and choose Copy Shortcut, Of Current View. However, this will copy into your clipboard the entire URL including http://crm.somesite.com/.
The problem with including the entire URL is that the Outlook client will not work when you go into offline mode even though the URL is actually pointing to a view within CRM. So, instead of doing something like http://crm.somesite.com/_root/homepage.aspx?etc=1&viewid=%7b3B3A7E9E-653E-DE11-A323-000C29ECA927%7d you would instead use /../_root/homepage.aspx?etc=1&viewid=%7b3B3A7E9E-653E-DE11-A323-000C29ECA927%7d.