(Resolved) [Important] Temporary Unavailability of keio.jp Phone Authentication (Voice/SMS) (July 22, 6:00 p.m.– 23, 6:45 a.m. JST)

(Resolved)
Okta has completed the scheduled maintenance, and keio.jp Phone (Voice Call, SMS) Authentication has now returned to normal operation. We sincerely apologize for the maintenance taking longer than originally planned and for the inconvenience caused. We greatly appreciate your patience and understanding throughout the maintenance.

(Update-2)
Okta has extended the maintenance window multiple times, and the service restoration time is currently undetermined.
We will update this notice as soon as new information becomes available and will provide another status update tomorrow morning (JST).
We sincerely apologize for the prolonged inconvenience and appreciate your continued patience and understanding.

(Update)
Although the scheduled maintenance window has passed, we have not yet received confirmation from Okta that the maintenance has been completed. According to the latest update from Okta, the maintenance is now expected to be completed around 11:30 PM (JST).
We sincerely apologize for the inconvenience and appreciate your patience while we await service restoration.

Emergency maintenance for keio.jp phone authentication (Voice/SMS) is scheduled for the following period. During this time, phone authentication (Voice/SMS) will be unavailable.

If you plan to use services requiring keio.jp sign-in during this period, please take one of the following actions in advance.
(*Users using authentication methods other than phone can use them as usual.)

Requests for Advance Action

• Sign in to the services you plan to use before the maintenance starts.

  (Since re-authentication may be required depending on the app or your environment, action "2" below is recommended.)

• Register and use an authentication method other than phone (Voice/SMS). (Recommended)

  Reference: keio.jp Multi-Factor Authentication Setting Manual (Additional Settings)

[Important] Future Handling of Phone Authentication

Regarding phone (Voice/SMS) authentication, there is a trend toward discouraging its use for security reasons, and keio.jp also plans to phase it out and eventually discontinue it. Please also check the following announcement.

[Important] Reviewing the use of phone authentication (SMS/Voice) in keio.jp MFA and request for migration to Passkeys, etc.
・For Students (Regular Degree Students)
・For Faculty and Staff