Need to get details of all the user on sharepoint site

Question

i have around 1000+ users in my tenant.
i am not sure what permissions have given to which user on which location on share point online site.
Is there any way to find this in office 365 ?
with the help of powershell or any  code?

Answer 1

Hi,
According to your description, you might want to get details about permissions of all users in your SharePoint Online tenant.
A solution can be like this: Iterate through all site collections in your tenant, all sites in each site collection, all lists/libraries in each sites. Then we can
start to check the user permissions on each of the object(site, list or library) retrieved, all the operation can be done with SharePoint Client Object Model with C#.
Here is a link about how to retrieve all site collections in a tenant:
http://sharepoint.stackexchange.com/questions/105653/retrieve-all-site-collections
About how to enumerate all the sites and lists in a site collection:
https://social.msdn.microsoft.com/Forums/sharepoint/en-US/284b5f9c-104e-4cbb-8d59-757274f075c5/get-all-subsites-under-site-collection-by-sharepoint-2010-client-object-model?forum=sharepointdevelopmentprevious
https://msdn.microsoft.com/en-us/library/office/ee538683(v=office.14).aspx
Here is a working demo about how to get user permissions of a list using Client Object Model, you can use it as a reference:
public static void getListRoleAssignments()
string siteUrl = "http://yoursite";
string listName = "List1";
ClientContext ctx = new ClientContext(siteUrl);
List myList = ctx.Web.Lists.GetByTitle(listName);
var roles = ctx.LoadQuery(
myList.RoleAssignments.Include(
roleAsg => roleAsg.Member,
roleAsg => roleAsg.RoleDefinitionBindings.Include(roleDef => roleDef.Name)));
ctx.ExecuteQuery();
foreach (RoleAssignment ra in roles)
Console.WriteLine("User or Group: " + ra.Member.LoginName.ToString());
var rdc = ra.RoleDefinitionBindings;
string permission = string.Empty;
foreach (var rdbc in rdc)
Console.WriteLine("Permission: " + rdbc.Name.ToString());
Console.WriteLine("+++++++++++++");
It won't be an easy job to make all these things working together, therefore, a fact you might want to take into consideration is that more time and effort would be
required.
Feel free to reply if there still anything I can help in this requirement.
Best regards
Patrick Liang
TechNet Community Support