ISub Softwares

ISub Softwares ISub Softwares is a Kolkata based software development and IT consultancy company Our service catalogue consist of the below.

1.

ISub Softwares is a Kolkata, West Bengal, India based software development and IT consultancy company. We help our clients create IT plans and strategy, utilize cloud infrastructure, utilize virtualisation and containerization technologies, lower software and IT infrastructure TCO by migrating to Free and Open source software stack, application design, development and testing. Create HA database c

lusters in multi-primary mode of operation for both read and write scale out.
2. Database design, development and testing.
3. Database backup and restore, incremental backups and point-in-time database recovery.
4. Database migration from proprietary products to free and open source products.
5. Implement complete offsite backup and DR for IT services while maintaining your RTO and RPO.
6. Create highly scalable / highly available micro services architecture using RESTful API design for mobile / web applications with the ability to scale all layers of the architecture horizontally.
7. System migration from in-house to cloud infrastructure.
8. Moving from cloud / dedicated server based virtual machines to system containers for increasing efficiency and lowering costs.
9. Office IT deployment and automation like Mail servers, Calendering, Address books, Directory services (LDAP), Webmail, Web servers, Company websites, File servers, Backup and restore.
10. Migrating from Windows to GNU/Linux for workstations and office desktops.

We have a new bug fix and stability release for our CardDAV server for LDAP.
27/04/2026

We have a new bug fix and stability release for our CardDAV server for LDAP.

-- Installation (using composer) composer create-project isubsoft/ldap-carddav:v1.0.1 --prefer-dist -- Release notes Improved documentation for cache backends specially with respect to suitability...

First major release of our CardDAV server for LDAP is here!
26/03/2026

First major release of our CardDAV server for LDAP is here!

-- Release notes First major release. Installation (using composer) - composer create-project isubsoft/ldap-carddav --prefer-dist. For more information regarding installation check INSTALL file. R...

New beta release of our CardDAV server for LDAP is here! Moving towards first major release.
15/03/2026

New beta release of our CardDAV server for LDAP is here! Moving towards first major release.

-- Release notes NOTE: Direct upgrade path from earlier release is not possible due to sync database changes. See data migration section below. PostgreSQL now supported for sync database. Properti...

Our CardDAV server for LDAP is moving towards major release!
09/03/2026

Our CardDAV server for LDAP is moving towards major release!

ldap-carddav | ldap-carddav - A CardDAV server with a LDAP server as contacts and authentication backend -- The following features are available 1. Create, edit, rename and delete contacts directly in LDAP server using CardDAV protocol. 2. Authenticate CardDAV users against LDAP server. 3.

New beta release of our CardDAV server for LDAP is here!
15/10/2025

New beta release of our CardDAV server for LDAP is here!

-- Release notes Added caching of vCards and principal attributes within the application. Reduced backend queries for performance reasons. Other improvements. Package archives which include all d...

New beta release of our CardDAV server for LDAP is here!
09/07/2025

New beta release of our CardDAV server for LDAP is here!

-- Release notes Bug fix: Throw valid exception if a certain operation is not supported on entities like principal and address book. Bug fix: Validate incoming vCard before accepting it for furthe...

New beta release of our CardDAV server for LDAP is here!
02/06/2025

New beta release of our CardDAV server for LDAP is here!

-- Release notes Enhancements to sync database configuration options Workaround added for WebDAV sync clients like Mozilla Thunderbird Performance improvement - Not doing full refresh of backend co...

New beta release of our CardDAV server for LDAP is here!
16/05/2025

New beta release of our CardDAV server for LDAP is here!

-- Release notes Added support for date time vCard properties. WebDAV sync in the application now follow standards for initial sync, clients which are not compliant will need work arounds. Perform...

Our CardDAV server for LDAP product page on LinkedIn
17/04/2025

Our CardDAV server for LDAP product page on LinkedIn

ldap-carddav | A CardDAV server with LDAP as authentication and contacts backend. The following features are available 1. Authenticate CardDAV users against LDAP. 2.

An informative article on LDAP - vCard interoperability
11/04/2025

An informative article on LDAP - vCard interoperability

Informative article on LDAP - vCard interoperability

Address

Dashadrone, Rajarhat Main Road
Kolkata
700136

Opening Hours

Monday 9:30am - 6:30pm
Tuesday 9:30am - 6:30pm
Wednesday 9:30am - 6:30pm
Thursday 9:30am - 6:30pm
Friday 9:30am - 6:30pm

Telephone

+919871482815

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