Understanding login name format of SharePoint

Question

I have come across various SharePoint login name format such as

"c:0o.c|federateddirectoryclaimprovider|<group_guid>",
"c:0o.c|federateddirectoryclaimprovider|<group_guid>",
"c:0(.s|true",
"c:0-.f|rolemanager|spo-grid-all-users/<tenant_id>",
"c:0t.c|tenant|<guid>", etc.

I want to understand more on the format of these login name and also know the types of different login names that may exists in a SharePoint online site.

Answer 1

Hi @Ivan Maria ,

SharePoint Online display identity claims with the following encoding format:

<IdentityClaim>:0<ClaimType><ClaimValueType><AuthMode>|<OriginalIssuer (optional)>|<ClaimValue>  

Components explained:

<IdentityClaim>

• <IdentityClaim> indicates the type of claim and is the following:
  “i” for an identity claim
  “c” for any other claim

<ClaimType>

• <ClaimType> indicates the format for the claim value and is the following:
  “#” for a user logon name
  “.” for an anonymous user
  “5” for an email address
  “!” for an identity provider
  “+” for a Group security identifier (SID)
  “-“ for a role
  “%” for a farm ID
  “?” for a name identifier
  "\" for a private personal identifier (PPID)
  "e" for a user principal name (UPN)
  """ for a user ID
  "$" for a distribution list security identifier (SID)
  "&" for a process identity security identifier (SID)
  "'" for a process identity logon name
  "(" for an authenticated user
  ")" for a primary security identifier (SID)
  "*" for a primary group security identifier (SID)
  "0" for an authorization decision
  "1" for a country
  "2" for a date of birth
  "3" for a deny only security identifier (SID)
  "4" for DNS
  "6" for a gender
  "7" for a given name
  "8" for a hash
  "9" for a home phone
  "<" for a locality
  "=" for a mobile phone
  ">" for a name
  "@" for other phone
  "[" for a postal code
  "]" for RSA
  "^" for a secure identifier (SID)
  "_" for a service principal name (SPN)
  "`" for a state or province
  "a" for a street address
  "b" for a surname
  "c" for a system
  "d" for a thumbprint
  "f" for a uniform resource name (URI)
  "g" for a web page

<ClaimValueType>

• <ClaimValueType> indicates the type of formatting for the claim value and is the following:
  “.” for a string
  “+” for an RFC 822-formatted name
  ")" for an integer
  """ for a Boolean
  "#" for a date
  "$" for a date with time
  "&" for a double
  "!" for a Base64 formatted binary
  "0" for a X.500 formatted name

<AuthMode>

• <AuthMode> indicates the type of authentication used to obtain the identity claim and is the following:
  “w” for Windows claims (no original issuer)
  “s” for the local SharePoint security token service (STS) (no original issuer)
  “t” for a trusted issuer
  “m” for a membership issuer
  “r” for a role provider issuer
  “f” for forms-based authentication
  “c” for a claim provider

<OriginalIssuer>

• <OriginalIssuer> indicates the original issuer of the claim.

<ClaimValueType>

• <ClaimValueType> indicates the value of the claim in the <ClaimType> format.

  Common types of login names in SharePoint online:

• Everyone -> c:0(.s|true
• Everyone except external users -> c:0-.f|rolemanager|spo-grid-all-users/<tenant_id>
• Group memebers -> c:0o.c|federateddirectoryclaimprovider|<group_guid>
• Group Owners -> c:0o.c|federateddirectoryclaimprovider|<group_guid>
• "Company Administrator" in Sharepoint Admin console -> c:0t.c|tenant|<UNKNOWN-GUID>
• An O365 user ->i:0#.f|membership|<USER-EMAIL>

Reference: SharePoint 2013 and SharePoint Online Built-In Accounts

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