D5e6af94-cdf0-4cf4-bc48-f9bfba16b189 Better -
The compact binary representation (16 bytes) is efficient for indexing and storage, while the hyphenated string is human-readable and easy to transmit via JSON, URLs, or logs.
Platforms like Microsoft Teams or Sharepoint may trigger error messages such as AADSTS7000112: Application 'd5e6af94-...' is disabled . In this scenario, the string refers to the unique identification key assigned to your app registration. Resolving it requires an administrator to re-enable the application permissions within the cloud console.
), the probability of generating the same ID twice is astronomically low.
In the vast landscape of digital identifiers, few strings carry as much weight in system architecture and database management as the seemingly random sequence: . At first glance, it looks like a typical error code or a forgotten password hash. However, this specific 36-character string is a perfect example of a Universally Unique Identifier (UUID) version 4.
When a developer registers an application in a cloud environment, the system automatically provisions multiple GUIDs. The is a static public identifier tied uniquely to the code logic, remaining identical regardless of which corporate tenant installs it. The Object ID , conversely, is a localized unique identifier representing a specific instance of that application (a Service Principal) or a user within a specific corporate directory. 2. Service Principals and Multi-Tenant Apps d5e6af94-cdf0-4cf4-bc48-f9bfba16b189
In computer science and software architecture, strings formatted like this are not intended to be human-readable words. Instead, they serve as unique digital signatures used by systems to identify distinct software components, database entries, API configurations, or user sessions without risk of duplication.
Web applications append a unique string to HTTP request headers as a "Correlation ID." If a user experiences a payment failure, customer support can track d5e6af94-cdf0-4cf4-bc48-f9bfba16b189 across microservices to pinpoint exactly where the transaction dropped.
All of these rely on operating-system entropy ( /dev/urandom on Unix, CryptGenRandom on Windows) to produce high-quality randomness.
Looking at your specific token, we can break down its component structure: The compact binary representation (16 bytes) is efficient
: Developers use these strings to ensure every row in a table (like a user account or product entry) has a 100% unique ID that won't clash with others. API Client ID
: Use UUIDv7 (time-ordered with millisecond precision) or ULIDs (Lexicographically Sortable Identifiers). They give you the uniqueness of random bits plus the sorting benefit of sequential IDs.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
The or database log surrounding it
A Universally Unique Identifier (UUID) is a standardized 36-character alphanumeric string used in computer systems to uniquely identify information. The system is standardized by the Internet Engineering Task Force (IETF) in RFC 4122 (and updated in RFC 9562).
Thus d5e6af94-cdf0-4cf4-bc48-f9bfba16b189 strictly follows RFC 4122.
A standard 4-byte or 8-byte integer is far smaller than a 16-byte raw (or 36-byte string-formatted) UUID, inflating index sizes and consuming server RAM.
