>>>Hi
>>>
>>>Do I need to ensure everyone is disconnected before running a reindex.
>>>
>>>If there are people using the database how does that affect a reindex.
>>>
>>>Thanks
>>
>>It depends on your SQL Server version. Enterprise / Developer version allows indexing while using a table.
>
>So if I can do it despite users being in the system ?

Yes, if your SQL Server is one of the listed. But this is still not recommended.