London-based Anjem Choudary is accused of inviting support for the banned group on social media from June 2014 to March 2015.
The 48-year-old was being held on remand in prison and appeared before Old Bailey court in London via videolink from the high security Belmarsh prison.
Co-defendant Mohammed Mizanur Rahman was also bailed during the same hearing.
Both men face trial next year and have indicated they would be pleading not guilty.
"I am not persuaded in either case that there are substantial grounds for believing that either defendant will fail to surrender to custody," he said.
"I have been much more concerned to whether there are substantial grounds for believing that they will commit further offences. I am concerned about anything being disseminated publicly by either of them or on their behalf which would encourage others to go to live in Syria as part of their religious duty."
He said both men should be carefully monitored and returned to court if bail conditions are breached.
A plea hearing will take place before the trial begins on January 11, 2015.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
