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when i try this it gives me a message saying<br />
<br />
New user doesnot have SID history<br />
<br />
What could be the reason..
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when i try this it gives me a message saying

New user doesnot have SID history

What could be the reason..

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Use it with the -ignoresidhistory switch
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our company had a site that had users who had different levels of access on different sites and doc libraries, now we moved our company site to a different server and our domain name also changed due to some organizational changes. For example in the past a user &nbsp;was abc\john and now it is xyz\john . Is there a way that i can change the domain name for all the users at &nbsp;1 shot? &nbsp;Users , usernames and permissions for those usernames should be same, We just have to change domain name. How can we do this?
</div>
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our company had a site that had users who had different levels of access on different sites and doc libraries, now we moved our company site to a different server and our domain name also changed due to some organizational changes. For example in the past a user  was abc\john and now it is xyz\john . Is there a way that i can change the domain name for all the users at  1 shot?  Users , usernames and permissions for those usernames should be same, We just have to change domain name. How can we do this?

Changing Domain names for users in sharepoint

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.