# 1.8 IIS rewrite map: The rule cannot be converted into an equivalent IIS format because of unsupported flags: E

**URL:** https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247
**Category:** Developer Experience
**Created:** [November 29, 2015, 12:15am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247 "2015-11-29T00:15:22Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![laercionit](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/laercionit/32/3594_2.png) [@laercionit](https://community.xibo.org.uk/u/laercionit)
#### Post date: [November 29, 2015, 12:15am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247/1 "2015-11-29T00:15:22Z")

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Error IIS MAP

RewriteRule .\* - [E=HTTP\_AUTHORIZATION:%{HTTP:Authorization}]

![](https://community.xibo.org.uk/uploads/default/original/1X/1dddc21ac14c0e42d14f234b6c93dffd7b266a3c.png)

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### Author: ![alex](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/alex/32/5782_2.png) [@alex](https://community.xibo.org.uk/u/alex)
#### Post date: [November 30, 2015, 7:42am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247/2 "2015-11-30T07:42:06Z")

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Hi

You can probably just remove that rule. It’s there to fix an issue in the way Apache processes non-GET requests.

As you know we don’t test with or particularly support IIS but thanks for posting it so others who meet this will be able to find it.

Alex

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### Author: ![laercionit](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/laercionit/32/3594_2.png) [@laercionit](https://community.xibo.org.uk/u/laercionit)
#### Post date: [December 6, 2015, 2:08am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247/3 "2015-12-06T02:08:32Z")

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The system works as remove the line.

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### Author: ![alex](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/alex/32/5782_2.png) [@alex](https://community.xibo.org.uk/u/alex)
#### Post date: [December 6, 2015, 10:39am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247/4 "2015-12-06T10:39:07Z")

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Thanks for the update

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### Author: ![alex](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/alex/32/5782_2.png) [@alex](https://community.xibo.org.uk/u/alex)
#### Post date: [December 6, 2015, 10:39am UTC](https://community.xibo.org.uk/t/1-8-iis-rewrite-map-the-rule-cannot-be-converted-into-an-equivalent-iis-format-because-of-unsupported-flags-e/4247/5 "2015-12-06T10:39:10Z")

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