How long does custom integration take?

Most custom SIS integrations are completed within 2-4 weeks, depending on system complexity and API availability.

Can you parse SQL exports?

Yes. If you can only export a CSV or SQL dump, we can build a ingestion pipeline to convert that into a live ICS feed.

Do you support Flat Files?

Yes. We can monitor an SFTP folder for dropped schedule files and process them instantly.

Is there a setup fee?

Custom integrations typically involve a one-time setup fee for the development of the connector, followed by standard SaaS licensing.

Custom / Legacy SIS Calendar Sync Fix

Q: Do you support on-prem deployment?

Yes. For institutions with strict data residency requirements, we offer dedicated on-prem instances.

Enterprise Security

Secure Calendar Gateway

Sanitize external calendar feeds before they reach your corporate Exchange/M365 environment. Zero-persistence proxy.

SOC 2 Type II Compliant Architecture
Strips malicious payloads & PII
SSO & Custom Domain Support

Audit Custom / Legacy SIS Feed

Paste the URL of your broken calendar feed

Paste your feed URL above to see specifically what's broken.

Infrastructure Audit

Common Custom / Legacy SIS Violations

We've analyzed thousands of Custom / Legacy SIS calendar feeds. Here are the most common RFC 5545 violations we detect and repair automatically at the network edge.

Total Error Types

Critical Errors

100%

Fixed Automatically

<15ms

Repair Latency

Technical Deep Dive

Why Custom / Legacy SIS Feeds Fail

Integration with legacy systems like Custom / Legacy SIS requires infrastructure-level remediation to ensure mobile sync reliability.

Legacy System Debt

Old on-prem SIS platforms generate non-compliant ICS feeds that modern clients reject.

Detailed Error

The VEVENT contains a property that is not supported by Microsoft Exchange.

Line 42: X-WIDGET-ID: 998...
Status: REJECTED

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Fix with Lokr

Custom Data Formats

Proprietary calendar formats require custom parsing logic to convert to standard iCalendar.

Sept

No Native Export

Some systems lack calendar export functionality entirely, requiring API-level integration.

Secure

Passthrough Encryption Active

Custom / Legacy SIS Proxy Mechanics

Custom SIS Integration Process

Contact our integration team with your SIS details.

We audit your current calendar export (if available).

We build a dedicated proxy or API connector.

You deploy the integration on-prem or via our cloud.

Students subscribe to the standardized Lokr feed.

Trusted by Custom / Legacy SIS Teams

We don't sell to end-users. We build for the engineers and admins who have to keep the systems running.

"Syncing our Exchange on-prem environment with our new Google Workspace acquisition was a nightmare. Lokr normalized the feeds instantly."

David K.

Global IT Manager, Financial Services

"We needed to expose Workday time-off calendars to managers' Outlook without complex integrations. Lokr handled the ICS translation perfectly."

Sarah M.

HRIS Architect, Global Manufacturing

"SAML-protected calendars were breaking our digital signage. Lokr provided a secure, tokenized proxy that played nice with our display hardware."

Priya P.

Workplace Tech Lead, Enterprise Software

Vertical Support

Industry Applications

Custom / Legacy SIS is a critical component for these industries. See how Lokr provides infrastructure-grade calendar sync for each specific vertical.